mod_default_rooms: Don't depend on mod_register

The mod_default_rooms module doesn't just work in conjunction with
mod_register, as bookmarks are also auto-added for users registered via,
for example, the "ejabberdctl register" command.  Update the code and
the documentation accordingly.

Thanks to Licaon_Kter for noting this.

mod_default_rooms/README.txt

@@ -7,8 +7,9 @@
 	DESCRIPTION
 	-----------
 
-This module allows for specifying one or more rooms that should be bookmarked
+This module allows for specifying one or more rooms that should be
-automatically on successful registration via `mod_register`.
+bookmarked automatically on successful user registration (via
+"mod_register", or, for example, "ejabberdctl register").
 
 
 	CONFIGURATION

mod_default_rooms/src/mod_default_rooms.erl

@@ -64,8 +64,7 @@ mod_options(_Host) ->
 
 -spec depends(binary(), gen_mod:opts()) -> [{module(), hard | soft}].
 depends(_Host, _Opts) ->
-    [{mod_private, hard},
+    [{mod_private, hard}].
-     {mod_register, soft}].
 
 %%--------------------------------------------------------------------
 %% ejabberd_hooks callbacks.