Merge github.com:fluxbb/fluxbb
Add link to hosting sponsor in footer.
Remove 'register account' link due to external authentication.
Add English translation for external authentication.
Add mod Easy BBCode
Prevent users from sending an email to other users when they don't have an email in their own profile (otherwise there is no reply-to address).

Conflicts:
	include/parser.php
	profile.php
	viewtopic.php
Conflict resolution
Apply https://github.com/openstreetmap/openstreetmap-forum/commit/0dab6a0a3ef5e7b0c3f1d186ae2e9102e92c6785 - Change login to use external authentication against http://api.openstreetmap.org
Add missing lang file for easybb
Merge remote-tracking branch 'mmd-osm/OpenStreetMap_forum.1.5.7' into OpenStreetMap_forum-1.5