Fixed typo in SQL query.

The spamassassin default also has a space, like in install/tpl/amavisd_user_config.master

Fixes #4972 Domain in spamfilter_user settings not punicode encoded

with stored username/passwords and ignore the "value" attribute on post.

Start checks against local sites list for allowed reverse proxy forwards

First workflow for allow reverse proxy with different site names
for ispconfig panel.

TODO: Allow only for sites known to the system itself instead
of all or none.