add new template-variables (SERVER_HOSTNAME, SERVER_IP, SERVER_IP and DOMAINNAME) to create-customer-email-template, fixes #432

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
Merge remote-tracking branch 'origin/0.9.31'
remove more aps/autoresponder/backup stuff

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>