Added support for $g_auto_set_status_to_assigned which allows enabling/disabling
of automatically setting the status to ASSIGNED when the handler_id is not 0.
This is useful if a user wants to differentiate a bug that is waiting in the queue
from another that a developer is actively working on. This is specially useful
with the auto-assign feature that was added recently.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1132 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9