Escape all string values in broken json from php-fpm status

[jvrsantacruz]

php-fpm status page sends a broken json where string values are not escaped.
eg: "user":"myval\srv_monitor"

There is a current fix in place specifically for the request uri field.
This pull request extends this fix to all string fields in the JSON response.

The problem with broken JSON is that only with regexes we cannot reliably split the JSON and extract the strings.
The strategy is to break down the string to get the values between field names in the form "user":, detect the values that are of type string and apply the same json.Marshall escaping.

Should fix #258 and #291

[jvrsantacruz]

Hi there! :-)

Is there anything else missing in the PR? I'd be more than happy to fix whatever is needed.
We're currently using a fork in our production environments and it's not ideal.

Thank you!

[jvrsantacruz]

Hi! :-)

Is there something that I can/need to add to the branch so it can be released?