Added support for git-stable branch (currently stable-3.1 branch) in ISPConfig update script for easier development and testing.

This is a considered as stable stable release. (tested the workflow successfully)
Note: I am not perfect at RegEx I know the RegEx for LOC- and DS-Records is actually not checking. The DS-Regex is definitely valid (tested on regexpal).
Along with my dns-status modification this should not be a problem at all.

Next step is to implement some DNSSEC-Requiring Record Types uon request of some others (will be within this branch before removing the WIP state)

Signing is not working, I need a energy drink to proceed...

Supposed behaviour just committing to have a point to roll back ICoE

And found a small bug (privkeys were not deleted on zone deletion) which is now fixed
Testing successful. Doing last test then if everything goes well this will be the new merge request

Signing is not working, I need a energy drink to proceed...

Supposed behaviour just committing to have a point to roll back ICoE

And found a small bug (privkeys were not deleted on zone deletion) which is now fixed
Testing successful. Doing last test then if everything goes well this will be the new merge request

* In addition to language specific custom welcome messages (when creating a new mail account) this patch will
allow to have a welcome message template for each domain.

* To add a domain specific welcome message, place a file at /usr/local/ispconfig/server/conf-custom/mail/
and name it according the domain, like welcome_email_example.com.txt

* i.e. /usr/local/ispconfig/server/conf-custom/mail/welcome_email_example.com.txt

will be used if a mailbox for example.com is created.

Dominik authored Dec 30, 2015 and Dominik committed Dec 30, 2015

After this, it is possible to use both:
 - sub.domain.tld
 - *.domain.tld
together with different folders by rewrite (with rewrite_type = L for sub.domain.tld)
Before it was not clearified which rule matches first, it always dependet on the creation-time of the subdomain

Conflicts:
	server/plugins-available/apache2_plugin.inc.php