Merge pull request #308 from wagnert/master

Merge with wagnert/master
Merge pull request #309 from wagnert/master

Closed #286 - Version number in server software signature + Set correct ...
Merge pull request #310 from wagnert/master

Bugfix missing timestamp replacement in .release-version file
Remove invalid call to process opcache-blacklist.txt.phtml in Composer post install script