2.27.94 (unstable):

Glib:
* OptionGroup:
  - Add add_entry() that takes a slot with callback function.
  (Kjell Ahlstedt) Bug #589197 (Hubert Figuiere)
  - on_post_parse() overrides no longer need to call the base class.
  (Kjell Ahlstedt) Bug #588988 (Hubert Figuiere)