MUC: Fire muc-room-destroyed event when the last participant leaves a non-persistent room
tools/ejabberd2prosody: ?xmlelement? can be ?xmlel? in newer ejabberd (thanks cr).
tools/ejabberd2prosody: Disable generating a config, as the format it generates is completely out of date.
mod_storage_sql2: Fix another SQL syntax error that slipped trough
mod_storage_sql2: Only attempt to delete conflicting items if an ID/key is given
Merge 0.9->0.10
Merge 0.10->trunk