Several fixes to Squid log helper using Krb

* Include domains with final slash as filtered when required
* Ignore 407 requests when auth is required in log helper
Added unit tests for 407/TCP_DENIED
Merge pull request #637 from Zentyal/ejhernandez/krb-fixes-squid-logs

Several fixes to Squid log helper using Krb
Handle connection errors in setAdminPort
Merge branch 'master' into jacalvo/3.2-final-changes

Conflicts:
	main/remoteservices/ChangeLog
	main/squid/ChangeLog