Fix blank lines in master.cf
Support array values in postfix::conf
Move most config variables out of init.pp

These can be managed separately by the postfix::conf resource type
Reorganise outbound_* variables
Remove tailing chaining arrow
Ideally change postfix reload/restart behaviour
Rename postfix reload exec
Move Exec[postfix::reload] out of service class

Causes triggering restart and reload when postfix::config class changes happen.
Whitespace
Don't create exec resource if hash is not present