Do not set localhost as primary resolver on external AD mode
Do not disable DNSResolver model on external AD mode
Force service principals update on _postServiceHook in external AD mode
Force DNS restart when mode is changed
Update users module dependencies versions
Improve squid group membership helper script
Merge branch '3.2' into scabrero/users-external-ad

Conflicts:
	main/users/ChangeLog
Merge pull request #718 from Zentyal/scabrero/users-external-ad

Scabrero/users external ad