* mandos: Move some global stuff into classes. (server, group): Moved into "AvahiService". All users changed. (AvahiService.group, AvahiService.server): New attributes. (entry_group_state_changed, server_state_changed): Moved into "AvahiService". All callers changed. (AvahiService.cleanup, AvahiService.activate): New. (_datetime_to_dbus): Moved into "ClientDBus". All callers changed. (ClientDBus._datetime_to_dbus): New.