Added Debian 11 as supported os
Added deb11 to all places were deb10 was in a if statement
Temporarily replaced MySQL with MariaDB,
since the MySQL repo is not yet avalible
Done because differences between distros is quite big,
and this was the beter solution then using alot of if statements
List of changes:
* Replaced service names php"$phpver"-fpm with $phpFPMService
* Replaced PHPver in package list with phpPkgName
* Replaced full php config path with $phpMainConf
* Replaced php pool path with $phpPoolDir
