Use class parameters to mirror variables
Define $puppet::server_vardir in server::install

This makes dependencies easier.
Switch from theforeman/apache to puppetlabs/apache

This silently ignores the PassengerMaxPoolSize parameter now.
Drop 2.6 support
Specify a file mode on site.pp due to PUP-1255
Fix pl-apache version to be valid, workaround librarian-puppet bug
Bump stdlib min to 2.0 to fix Forge upload error
Release 2.0.0