Create and set permissions for spool and printer driver directories
Split printers configuration to its own config file
cupsd.conf: Do not listen on unix socket

This fixes the broken pipe managing printers
Enable smbd embedded spoolss and configure printers on printers.conf
Fix missing argument exception adding user entries to printer ACL
Do not syncRows if CUPS daemon stopped

Otherwise all printers are removed because Net::CUPS returns an empty list
Add warning message for developers
Write printers.conf after CUPS daemon has started
Set printer 'valid users' to object SIDs instead names

Otherwise groups are not expanded
Enable Point'n'Print share
Merge pull request #1541 from Zentyal/scabrero/samba-printers

Scabrero/samba printers