Comet Cache v170808-RC

• New Feature: Memcached / RAM (Pro): Comet Cache Pro now includes support for Memcached / AWS ElastiCache to serve the cache directly from RAM. This allows for a faster cache delivery than what is possible when serving the cache via disk. Memcached / AWS ElastiCache can be configured from Dashboard → Comet Cache Pro → Plugin Options → RAM / Memcached. See Issue #47
• Enhancement: Added Referrer-Policy to whitelist for cachable HTTP headers. See Issue #892.
• Bug Fix (Pro): The Cache Statistics feature was broken when the PHP disk_total_space() and/or disk_free_space() functions were disabled by the PHP configuration. Comet Cache now handles this scenario gracefully by hiding disk-related stats when those functions are not allowed. See Issue #775
• Bug Fix (Pro): The HTML Compressor was returning an empty string upon encountering an invalid UTF-8 sequence. See Issue #871 reported by a Comet Cache user.
• Compatibility (Pro): Many improvements to the Pro software update system, including changes to the API Endpoints and the Proxy Fallback endpoint. See Issue #879 and Issue #315 for full details.
• Compatibility: Fixed a WooCommerce compatibility issue that was generating a "Notice: id was called incorrectly. Product properties should not be accessed directly." Props @vestaxpdx. See Issue #896.

Comet Cache v170220

• New Feature: Comet Cache can now be configured to automatically clear the cache for date-based archive views whenever any single post is cleared due to changes in content, title, etc. See: Dashboard → Comet Cache → Plugin Options → Automatic Cache Clearing → Auto-Clear "Date-Based Archives" Too?. See also: Issue #724.
• New Pro Feature: Apache Optimizations now include a new option that allows site owners to enforce an exact host name for all requests. See: Dashboard → Comet Cache Pro → Plugin Options → Apache Optimizations → Enforce an Exact Host Name?. See also: Issue #101.
• Bug Fix: Apache detection sometimes inaccurate. So instead of using default WP core globals for server detection, Comet Cache now uses it's own set of Apache/Nginx/IIS detection functions. And, this release enhances our Apache and Nginx detection routines; making them smart enough to catch additional edge cases; i.e., to further reduce the likelihood of there being a false-positive. See Issue #748.
• Bug Fix: Some XML-RPC and REST API requests were being cached inadvertently. See Issue #855.
• Bug Fix: Broken textarea field due to white-space:nowrap in Firefox. See Issue #866.
• Bug Fix: This release resolves empty directories being left in the cache folder, in some scenarios. See Thread #866.
• Bug Fix (Pro): Some REST requests were being redirected incorrectly whenever Apache Optimizations were enabled. See Issue #855.
• Compatibility Bug Fix: Some Jetpack API calls were being cached inadvertently. See Issue #855.
• Enhancement: Notes in HTML source now indicate fully functional on first load for improved clarity. See Issue #860.
• Enhancement: Enhancing security by removing basename(__FILE__) from direct access notices.

Comet Cache v170201-RC

• New Feature: Comet Cache can now be configured to automatically clear the cache for date-based archive views whenever any single post is cleared due to changes in content, title, etc. See: Dashboard → Comet Cache → Plugin Options → Automatic Cache Clearing → Auto-Clear "Date-Based Archives" Too?. See also: Issue #724.
• New Pro Feature: Apache Optimizations now include a new option that allows site owners to enforce an exact host name for all requests. See: Dashboard → Comet Cache Pro → Plugin Options → Apache Optimizations → Enforce an Exact Host Name?. See also: Issue #101.
• Bug Fix: Apache detection sometimes inaccurate. So instead of using default WP core globals for server detection, Comet Cache now uses it's own set of Apache/Nginx/IIS detection functions. And, this release enhances our Apache and Nginx detection routines; making them smart enough to catch additional edge cases; i.e., to further reduce the likelihood of there being a false-positive. See Issue #748.
• Bug Fix: Some XML-RPC and REST API requests were being cached inadvertently. See Issue #855.
• Bug Fix: Broken textarea field due to white-space:nowrap in Firefox. See Issue #866.
• Bug Fix: This release resolves empty directories being left in the cache folder, in some scenarios. See Thread #866.
• Bug Fix (Pro): Some REST requests were being redirected incorrectly whenever Apache Optimizations were enabled. See Issue #855.
• Compatibility Bug Fix: Some Jetpack API calls were being cached inadvertently. See Issue #855.
• Enhancement: Notes in HTML source now indicate fully functional on first load for improved clarity. See Issue #860.
• Enhancement: Enhancing security by removing basename(__FILE__) from direct access notices.

Comet Cache v161221

• Bug Fix: Improving PHP OPcache detection. Now considering the INI option opcache.restrict_api. Comet Cache is now smart enough to avoid generating the PHP Warning: PHP Warning: Zend OPcache API is restricted by "restrict_api" configuration directive. See Issue #733.
• New Feature (Pro): Mobile Mode. This release adds a new feature that is designed to improve compatibility with Adaptive themes for mobile devices. To learn more, please see: Dashboard → Comet Cache Pro → Plugin Options → Mobile Mode. See also: Issue #471.
• Enhancement: Auto-Clearing Author Page Cache. This release makes Comet Cache smart enough to detect when a user is deleted (or removed from a child blog in a Network), at which time the Author page for that user will be cleared from the cache so it can be regenerated automatically. See Issue #304.
• Enhancement: Multibyte Compatibility. This release improves support for WordPress Permalinks that contain UTF-8 symbols (or emojis) in them. More specifically, this release adds the /u flag to all preg_*() calls in cache clearing routines that generate cache paths from Watered-Down Regex patterns entered by a site owner. See: Issue #611.
• Enhancement: Widget Change Detection. Comet Cache can now detect when Appearance → Widgets are added/edited/removed, and Comet Cache will automatically clear the cache so that your site remains up-to-date. See Issue #411.
• Enhancement (Pro): Static CDN Filters and srcset. This release enhances Static CDN Filters in Comet Cache Pro. Static CDN Filters are now smart enough to filter all image sources included in an srcset="" attribute that is generated by WordPress. See Issue #660. If you'd like to learn more about srcset="", see this article at WordPress.org.
• Enhancement (Pro): Automatic Background Updates. It is now possible to enable automatic background updates that occur quietly in the background whenever new features, bug fixes, or security issues are addressed by our developers. See: Dashboard → Comet Cache Pro → Config. Options → Update Credentials. See also: Issue #827.
• Enhancement (Pro): HTML Compressor + Accelerated Mobile Pages (AMP). Updated to the latest available release of the HTML Compressor (v161208) with improved support for Accelerated Mobile Pages. See: Issue #695. See also: HTML Compressor v161208 changelog.
• Enhancement (Pro): HTML Compressor / AMP Compatibility. Improved compatibility with Accelerated Mobile Pages. There is a new HTML Compressor option that is enabled by default and it makes Comet Cache smart enough to auto-detect and selectively disable portions of the HTML Compressor that are incompatible with the AMP spec; i.e., routines that are not necessary when serving APMd pages. In short, if the URI being compressed ends with /amp/, or the document contains a top-level <html ⚡> tag (<html amp> is accepted as well), then features which are incompatible with Accelerated Mobile Pages will be disabled accordingly.
• Compatibility: Avoid deprecated wp_get_sites() and use get_sites() instead. See Issue #848.
• Documentation: Added Watered-Down Regex documentation notes to the inline documentation (in the software) about the use of ^ and $ in some places where these special characters are not fully supported. Also adding the same notes to the Watered-Down Regex KB Article. See also: Issue #611.

Comet Cache v161214-RC

• Bug Fix: Improving OPcache detection. Now considering INI option opcache.restrict_api. Comet Cache is now smart enough to avoid the error: PHP Warning: Zend OPcache API is restricted by "restrict_api" configuration directive. See Issue #733.
• New Feature (Pro): Mobile Mode. This release adds a new feature that is designed to improve compatibility with Adaptive themes for mobile devices. To learn more, please see: Dashboard → Comet Cache Pro → Plugin Options → Mobile Mode. See also: Issue #471 and the screenshots here.
• Enhancement: Auto-Clearing Author Page Cache. This release makes Comet Cache smart enough to detect when a user is deleted (or removed from a child blog in a Network), at which time the Author page for that user will be cleared from the cache so it can be regenerated automatically. See Issue #304.
• Enhancement: Multibyte Compatibility. This release improves support for WordPress Permalinks that contain UTF-8 symbols (or emojis) in them. More specifically, this release adds the /u flag to all preg_*() calls in cache clearing routines that generate cache paths from Watered-Down Regex patterns entered by a site owner. See: Issue #611.
• Enhancement: Widget Change Detection. Comet Cache can now detect when Appearance → Widgets are added/edited/removed, and Comet Cache will automatically clear the cache so that your site remains up-to-date. See Issue #411.
• Enhancement (Pro): Static CDN Filters and srcset. This release enhances Static CDN Filters in Comet Cache Pro. Static CDN Filters are now smart enough to filter all image sources included in an srcset="" attribute that is generated by WordPress. See Issue #660. If you'd like to learn more about srcset="", see this article at WordPress.org.
• Enhancement (Pro): Automatic Background Updates. It is now possible to enable automatic background updates that occur quietly in the background whenever new features, bug fixes, or security issues are addressed by our developers. See: Dashboard → Comet Cache Pro → Config. Options → Update Credentials. See also: Issue #827.
• Enhancement (Pro): HTML Compressor + Accelerated Mobile Pages (AMP). Updated to the latest available release of the HTML Compressor (v161208) with improved support for Accelerated Mobile Pages. See: Issue #695. See also: HTML Compressor v161208 changelog.
• Enhancement (Pro): HTML Compressor / AMP Compatibility. Improved compatibility with Accelerated Mobile Pages. There is a new HTML Compressor option that is enabled by default and it makes Comet Cache smart enough to auto-detect and selectively disable portions of the HTML Compressor that are incompatible with the AMP spec; i.e., routines that are not necessary when serving APMd pages. In short, if the URI being compressed ends with /amp/, or the document contains a top-level <html ⚡> tag (<html amp> is accepted as well), then features which are incompatible with Accelerated Mobile Pages will be disabled accordingly.
• Compatibility: Avoid deprecated wp_get_sites() and use get_sites() instead. See Issue #848.
• Documentation: Added Watered-Down Regex documentation notes to the inline documentation (in the software) about the use of ^ and $ in some places where these special characters are not fully supported. Also adding the same notes to the Watered-Down Regex KB Article. See also: Issue #611.

Comet Cache v161119

• Bug Fix: Avoid browser autocomplete in configuration fields by adding autocomplete="off" to all form tags in Comet Cache menu pages. See Issue #832.
• Bug Fix: Fixed a broken link to the Static CDN Filters tutorial for MaxCDN integration. Props @kristineds. See Issue #842.
• Bug Fix: Multisite installations inside a subdirectory were broken by Apache Optimizations via .htaccess in some scenarios. Fixed in this release. See Issue #798.
• Bug Fix: Don't enqueue Chart.js unnecessarily in lite version of the software. See Issue #830.
• Bug Fix: Enhancing WooCommerce integration by listening to the woocommerce_product_set_stock_status hook in addition to the woocommerce_product_set_stock hook. See Issue #674.
• Bug Fix (Pro): Automatically dismiss any persistent update notifications whenever a new version of the software is recompiled; i.e., don't continue to show an upgrade notice whenever the software has just been updated by a site owner. See Issue #806.
• Enhancement: This version enhances the HTML comments left in the source code (HTML Debug Notes). When debug notes are enabled (i.e., HTML comments) they are now broken down into key/value pairs and tabulated for a cleaner display and easier debugging. See Issue #790.
• Performance Enhancement: For sites configured to allow query string variables into the cache, those variables are now sorted by key name internally to avoid duplicate cache files; i.e., whenever the order of query string variables changes from request to another, but with the same exact values. In short, Comet Cache now knows how to serve the same underlying cache file; i.e., from a previous request that may have had the same query string, just in a slightly different order. See Issue #639.
• UI Enhancement: The Comet Cache UI is now fully Responsive with an improved UI on laptop and mobile devices. Props @renzms. See Issue #699.
• UI Enhancement: This release improves the toggle link that allows you to see additional details whenever Comet Cache automatically clears more than one facet of the cache. See Issue #837 and Issue #831.
• UI Enhancement (Pro): Following improvements to the update API in a previous release of Comet Cache that made it possible to update both the lite and pro versions of the software through normal WordPress update mechanisms, this release removes some clutter from the menu pages for Comet Cache. In short, now that we have a tighter integration with WordPress core, it's no longer necessary for Comet Cache to display update notifications in a custom way. See Issue #829.
• UI Enhancement (Pro): On pro version activation, display a notice that reminds site owners to configure their Pro Update Credentials so they'll be notified by WordPress about new versions of the pro software. See Issue #477.
• New Pro Feature: In the pro version it is now possible to define a list of GET request variable names that should be ignored entirely by Comet Cache. See: Dashboard → Comet Cache → Plugin Options → GET Requests → List of GET Variable Names to Ignore. As an example, this new feature makes it possible for site owners to pass query string variables associated with Google Analytics (i.e., utm_* variable names) without incurring a cache performance hit. See Issue #639.
• Nonce Support (Pro): In the pro version, when logged-in user caching is enabled, Comet Cache is now capable of intelligently caching pages that contain Nonce values (numbers used once). This allows for pages containing the WordPress Admin Bar to be cached without issue. It also improves compatibility with plugins like bbPress and BuddyPress, resulting in better performance and faster speeds for logged-in users. See Issue #793.
• RevSlider Compat.: This release includes a built-in exclusion rule for the HTML Compressor to allow for improved compatibility with the popular RevSlider plugin for WordPress. The new built-in exclusion rule looks for and automatically bypasses an important style tag that must be preserved for the RevSlider plugin to work in all scenarios; i.e., <style id='rs-plugin-settings-inline-css'. See Issue #614.
• i18n Compat. (Lite): This release makes all pro preview labels translatable by moving the labels that were previously defined in CSS only into HTML attribute values. See Issue #808.

Props to everyone who helped with this release, including @moretarman, @Presskopp, @SkyViewPros, @ThePopularizer, @Highacid, @lkraav, @bridgeport, @ricsmo, @Metacowboy, @renzms, @jaswsinc, @kristineds, and our 179 Beta Testers!

Comet Cache v161116-RC

Comet Cache v161116-RC via Phing.

Comet Cache v160917

• New Feature (Lite): The Clear Cache button is now available in the Admin Toolbar for the Lite version of Comet Cache.
• New Feature (Pro): Comet Cache Pro is now fully compatible with WordPress Automatic Background Updates. If you enable automatic background updates for plugins, and you save valid Comet Cache Pro License Credentials in the Comet Cache Pro → Plugin Options → Update Credentials panel, you will automatically receive Pro plugin updates. Props @jaswsinc. See Issue #289.
• Bug Fix: In some scenarios Comet Cache might produce a false-positive "Warning: mkdir(): File exists" message when checking if the cache directory exists. Comet Cache now calls clearstatcache() and uses file_exists() instead of is_dir() to help make this check more robust. See Issue #786.
• Bug Fix: Fixed a bug where the Comet Cache PHP requirements check would fail and produce a fatal error when upgrading from a version of Comet Cache that did not require an extension that is now required by newer releases. This would occur when, for example, the required PHP mbstring extension was missing. Props @jaswsinc for finding the bug. See Issue #817.
• Bug Fix: Fixed a bug where upgrading from v160521 would result in the Client-Side Cache option being reset to the default (disabled). If you enabled the Client-Side Cache at some point, now is a good time to double-check that it's still enabled. This bug fix also improves the reliability of all version upgrade routines that Comet Cache runs during upgrades. See Issue #807.
• Compatibility / Bug Fix: The automatic Clear Cache routines that cleared the entire cache automatically whenever WordPress Dashboard → Settings → General was updated, were being too aggressive and not taking into consideration other plugins that might also be using the same options-general.php URL. As a result, the entire cache was being unnecessarily cleared when the settings for those other plugins were saved. Props to @futtta from Autoptimize for reporting. See Issue #825.
• UI Enhancement: Adjusted option page font styles for WordPress v4.6 to better match existing style. See Issue #271.
• ManageWP Compatibility (Pro): Comet Cache Pro is now compatible with ManageWP, a service that allows remote management of multiple WordPress sites. Comet Cache Pro Plugin Updates will now appear in the ManageWP dashboard and, assuming you have saved valid license credentials in Dashboard → Comet Cache Pro → Plugin Options → Update Credentials, you will be able to upgrade Comet Cache Pro remotely from the ManageWP Dashboard. Props @jaswsinc. See Issue #465.
• InfiniteWP Compatibility (Pro): Comet Cache Pro is now compatible with InfiniteWP, an application that allows you to manage multiple WordPress sites from a single location. Comet Cache Pro Plugin Updates will now appear in the InfiniteWP dashboard and, assuming you have saved valid license credentials in Dashboard → Comet Cache Pro → Plugin Options → Update Credentials, you will be able to upgrade Comet Cache Pro remotely from the InfiniteWP Dashboard. See Issue #394.
• Rewritten Pro Plugin Updater: The Comet Cache Pro Plugin Updater has been redesigned to use the built-in WordPress plugin updater system. When a Comet Cache Pro update is available, it now appears in the WordPress Updates section and in the Plugins list, like other WordPress plugins and can be updated normally like other WordPress plugins, as long as you have saved valid Comet Cache Pro license details in the new "Update Credentials" options panel. Props @jaswsinc. See Issue #272.
• Code Style: The WP_CACHE line that gets inserted into the wp-config.php file to enable caching now follows the WordPress PHP Code Standards. Props @szepeviktor. See Issue #799.
• Compatibility (Pro): When the Autoptimize plugin is active, the Comet Cache Pro HTML Compressor panel now shows a friendly notice explaining that both the HTML Compressor and Autoptimize should not be enabled at the same time because they both address the same performance improvements. The rest of Comet Cache works great alongside Autoptimize and whether you use the HTML Compressor or Autoptimize is a matter of preference. Props to @futtta from Autoptimize for the continued collaboration.

Comet Cache v160908-RC

Comet Cache v160908-RC via Phing.

Comet Cache v160706

• New Feature! Apache Optimizations. This release includes a completely new option panel for Apache Performance Tuning. Current options for Apache tuning include GZIP Compression, Leverage Browser Caching, Enforce Canonical URLs, and Send Access-Control-Allow-Origin Header (for Static CDN Filters). These options automatically add or remove from your .htaccess file the appropriate configuration based on the options you enable or disable (all options are disabled by default, so your .htaccess file is not modified unless you say so). If you prefer to update your .htaccess file manually, the necessary configuration can be viewed beneath each option. Props @jaswsinc, @renzms. See Issue #789.
• New Feature! A new "Enable GZIP Compression" option has been added to the new Apache Optimizations panel. This option will automatically add the appropriate configuration to your .htaccess file to enable GZIP compression. This option is disabled by default. The old "GZIP Compression" panel has been removed in favor of the new option inside Apache Optimizations. Props @renzms, @jaswsinc. See Issue #764.
• New Feature! Multisite Host Exclusion Patterns. It's now possible to exclude entire sites from the cache in a Multisite Network environment. Domain mapping is also supported! See Comet Cache → Plugin Options → Host Exclusion Patterns. If you're running a Multisite Network with Sub-Directories, you can exclude sites using the existing URI Exclusion Patterns feature. Props @kristineds. See Issue #754.
• New Feature (Pro)! A new "Leverage Browser Caching" option has been added to the new Apache Optimizations panel. This option will automatically add the appropriate configuration to your .htaccess file to enable Browser Caching. This option is disabled by default. Props @renzms, @jaswsinc. See Issue #764.
• New Feature (Pro)! A new "Enforce Canonical URLs" option has been added to the new Apache Optimizations panel. This options adds the appropriate .htaccess code to enforce the correct canonical URLs according to your WordPress Permalink settings (Comet Cache detects if the Permalink Structure ends with a trailing slash, or without a trailing slash). Props @renzms, @jaswsinc. See Issue #554.
• Bug Fix: In some scenarios the Cron Event that cleans up expired cache files (_cron_comet_cache_cleanup) would never run, or the Next Run time would constantly reset to 1 minute away from running every time a page was reloaded. We suspect this is a race condition and in attempt to work around this issue we now skip all of our Cron-related checks if Cron is currently in the middle of running a process. Props @xberg and @lkraav for help reporting. See Issue #653.
• Bug Fix: If your site uses aliased domains, Comet Cache now properly considers all possible domain variations when it clears the cache on WP Standard installations. Props @kristineds, @jaswsinc, @yoffe, and @VR51. See Issue #608.
• Bug Fix (Pro): Fixed a bug where Comet Cache would appear to prevent WordPress from redirecting Permalinks that don't include a trailing slash, to the URL that does include a trailing slash. This was due to the fact that Comet Cache loads very early on (for caching purposes) and as a result the WordPress redirect_canonical() function never gets run. This was fixed by adding an option to the new Apache Optimizations panel that allows you to Enforce Canonical URLs. Props @renzms, @jaswsinc. See Issue #554.
• UX Bug Fix (Pro): If you had your WordPress Dashboard login details saved by your browser, the browser autofill would automatically fill in the Pro Plugin Updater fields with those details, which then needed to be replaced with your actual Pro license details. The browser autofill has been disabled for those fields (tested in Chrome, Firefox, and Safari). Props @renzms. See Issue #741.
• Enhancement: Added links the Options Page for the Comet Cache Twitter and Facebook accounts. Props @renzms. Issue #771.
• Enhancement: Added full support for UTF-8 (multibyte strings). This release adds full support for UTF-8 throughout the Comet Cache codebase, greatly enhancing Comet Cache's ability to deal with file paths and URLs that may contain UTF-8 characters. Props @jaswsinc. Issue #703.
• UI Enhancements: Improved the Logged-In Users and the Client-Side Caching options panels to dim additional options when the feature is disabled. Additionally, the "Enable HTML Compression for Logged-In Users?" option has been relocated from the HTML Compressor option panel to the more appropriate Logged-In Users option panel. See Issue #768.
• UX Enhancement: Improved the inline docs for Auto-Clear List of Custom URLs to clarify that full URLs must be provided. Props @renzms. See Issue #781.
• Enhancement (Pro): The Pro Plugin Updater has been improved to allow for better compatibility with hosting platforms that use Apache's ModSecurity. In some cases, site owners were seeing a 404 error when attempting to update the Pro version using the Pro Plugin updater because certain ModSecurity rules were blocking the Pro Updater requests. The Pro Plugin Updater now uses WP Transients to store the necessary metadata, which works around the issue with ModSecurity. Props to @seozones for reporting and @jaswsinc for help fixing this. Issue #416.
• Enhancement (Pro): When Static CDN Filters are enabled, it's now possible to disable the automatic insertion of rules into your .htaccess file that are designed to prevent issues with CORS. See Apache Optimizations → Send Access-Control-Allow-Origin Header? See Issue #787.
• Enhancement (Pro): The HTML Notes added to the bottom of a cached page now specify if the page was cached as the result of an HTTP Request or if it was cached by the Auto-Cache Engine. Props @kristineds. See Issue #292.
• Enhancement (Pro): The Auto-Cache Engine now supports a fallback to cURL using the WP HTTP API. If your PHP configuration has allow_fopen_url=0, the Auto-Cache Engine will use the fallback to download the XML Sitemap and parse it from a temporary file. If you want to force the use of this fallback even when allow_fopen_url=1, you can use a filter. See Issue #440.
• UI Enhancement (Pro): A second button has been added to the bottom of the Pro Plugin Updater page that allows you to "Save and Update Comet Cache Pro" in one step. Props @renzms. See Issue #741.
• UI Enhancement (Pro): The "Cache Stats" button in Admin Bar is now linked to the Cache Stats page. Instead of hovering over the button and then clicking "More Info" inside the popup panel, you can now just click the "Cache Stats" button to go directly to the Cache Stats page. Props @Presskopp, @renzms. See Issue #780.
• Comment Mail Compatibility: Improved compatibility with the Comment Mail plugin by automatically clearing the cache whenever Comment Mail options are changed. Many of the Comment Mail options affect front-end portions of the site, so it's important that the cache is cleared whenever Comment Mail options change. See Comment Mail Issue #278.
• PHP Compatibility: Improved compatibility back to PHP 5.2 (the lowest version allowed by WordPress). Comet Cache still requires PHP 5.4+, but if you install Comet Cache on a site running PHP 5.2, it will now fail gracefully with a Dashboard notice indicating PHP 5.4+ is required, instead of producing a fatal error. See Issue #784.
• WP-CLI Compatibility: Fixed a bug with deactivating Comet Cache using WP-CLI. Doing so was producing a "Invalid argument; host token empty!" error message. This has been resolved. Props @MarioKnight @jaswsinc @renzms. See Issue #728.
• Renamed COMET_CACHE_ALLOW_BROWSER_CACHE constant to COMET_CACHE_ALLOW_CLIENT_SIDE_CACHE. Backwards compatibility has been maintained.
• Renamed allow_browser_cache plugin option to allow_client_side_cache.