Add new config key auth_ad_negative_acl_ttl
Explicitly specify to listen on all IPv4 interfaces
Fix warnings using numeric equal with strings
Correctly escape DNs and search filters or external ACL helper script
Retrieve nested group members for filter profiles in external AD mode
Indentation fixes
Fixed some wrong throws of MissingArgument exception without use
Merge branch 'scabrero/squid-fix-external-ad' into 3.2

Conflicts:
	main/squid/ChangeLog
added missing uses all over the code
Read DNS zones from samba database while provisioning
added changelog entries
Merge branch '3.2' into jacalvo/missing-uses

Conflicts:
	main/squid/ChangeLog
fixed syntax
Merge branch '3.2' into scabrero/samba-fix-join
Fixed bug in selectSetter which hitted selects on DataForm with  'unique' option enabled
fixed spacing
Merge pull request #763 from Zentyal/jag/select-unique-in-form

Fixed bug in selectSetter which hitted selects on DataForm with  'unique...
Merge pull request #762 from Zentyal/scabrero/samba-fix-join

Scabrero/samba fix join
Group membership mapping between OpenLDAP and Samba is using now Samba's objectGUID unique id to be 100% sure we match the right objects
Fixed typos