21.4.0

New

• Version bump to 2021Q4 [Thomas Merkel]
• Support munin with tls authentication and security [Thomas Merkel]
• Add shell script to generate SSH private, public key pair [Thomas Merkel]
• Add munin nullmailer warning and critical level [Thomas Merkel]
• Provide new mdata variable for znapzend_dst to send remote backups easily [Thomas Merkel]

Fix

• Provide workaround for screen close on ctrl+c [Thomas Merkel]
• Additional keys (F5, F6) for screen prev and next session (#3) [sk1ll10]
• Rename script because it's not only for root, support sudo [Thomas Merkel]

Other

• Install v0.18 SmartOS Munin Plugins [Thomas Merkel]
• Switch to py39-certbot because of new default python version [Thomas Merkel]