new user registration on 3rd-level domains

Currently domains like platform.xwiki.org only allows login and disallows new user registration.

This makes impression that only XWiki project members are allowed to modify main site.

If that is not the policy, then other xwiki domains should allow registration as well.

http://xwiki.475771.n2.nabble.com/XWiki-upgrade-instructions-tp7580046.html