New pull request

Add FTP Server info
Add PowerMTA 3RDP check
Add permissions/ownership check for files in /v/c/domain_keys/private
Add check for CL 5 and mod_php, mod_ruid2, MPM_ITK, & LiteSpeed or CL 6 and mod_php, mod_ruid2
This sub should continue to read '/var/cpanel/envtype' if it exists, and only fall back to executing the external '/usr/local/cpanel/bin/envtype' command if the file can't be opened.  That could replace the existing else {} block.  We also still need to set the Unknown string in the event that $envtype is empty when the above two things fail to populate it so that we never allow the possibility of returning an undefined value.

All external commands also need to be run via the timed_run() sub.