Fixes #335: Fix PHPMyAdmin Single-signon errors

Fixes #370: Fix insert query failure during import_cert

The sslcsr is just set to an empty string so that the query works properly.
Without it, queries fail since sslcsr does not have a default value set.

Improved the detail of the messages logged during the failure of that query as well.

Refs #335

Refs #335

Refs #335

Refs #335

Refs #335

Allow override of MultiViews option in .htaccess
Required by some service as NextCloud, Prestashop, ....

Do not add bind entries for sub domaines marked for deletion

Fixes #328

The default configuration in stretch doesn't work very well and
needs a couple of tweaks. This will generate the service files and
make sure opendkim is run as the opendkim user instead of root.

The alternc opendkim.conf template is updated so that the connection
can be made locally through a socket.

Revert "adding sync-unix-accounts.php, synchronize unix accounts with AlternC ones. not enabled by default, not even installed yet"

* We revert this commit as it's provided by an AlternC plugin
* Report to https://github.com/alternc/alternc-nss to get more informations

Note : This reverts commit 240a7738.

adding sync-unix-accounts.php, synchronize unix accounts with AlternC ones. not enabled by default, not even installed yet

[fix] fixing default_spf_value and default_dmarc_value NOT being initialized at runtime. Do it at alternc.instal time.

[fix] (for 3.5) fixing longstanding bug when we didn't deleted (or deleted too many) vhosts files in /var/lib/alternc/apache-vhost/.