Merge branch 'favourite_servers' of http://git.ispconfig.org/Cambra/ispconfig3 into Cambra/ispconfig3-favourite_servers

Conflicts:
	install/sql/incremental/upd_dev_collection.sql

Hide used domains

Domain must be unique for mail, dns or web site, so there is no point in get used domains on domain select (with domain module enabled) and this patch get only unused domains. For subdomains it doesn't apply, so it's not used.

This patch added some code to dns module because I added domain select on merge request #105 and commit is included here because I based this branch on branch from merge request #105. I can rebase to master if you #105 is merged if it's needed.

Master Fixes

Change for vmail-uid/gid settings in subdomains and aliasdomains

- Added incremental sql query collection file to make merging easier and avoid high patch file count

Fix is reseller

reseller are now allowed to have -1 for limit_client, but I found another place where a > 0 check was used

Master

Unlimited clients

Allow unlimited clients for reseller

Conflicts:
	interface/lib/lang/es.lng

Master

Spanish translation

I have fixed some wrong spanish translations and updated some untranslated ones

Master

Master

Improved API behaviour: The $params array must contain only the new values and not all values of a record on update. Setting all values does not hurt though, so the change is downwards compatible with older versions.

Master