2009-03-25  Vincent Untz  <vuntz@gnome.org>

	Create a END_SESSION_LAST phase during which we handle the clients
	which wanted to be ended last.
	For this, we need to keep a list of clients in that case.

	* gnome-session/gsm-client.h: add a new
	GSM_CLIENT_END_SESSION_FLAG_LAST flag, to tell the client it's running
	last.
	* gnome-session/gsm-manager.[ch]: (phase_num_to_name): handle new phase
	(end_phase): empty the list of clients that wants to be ended last if
	it's not a relevant phase. Also handle new phase.
	(on_phase_timeout): handle new phase
	(_client_end_session_last): new, to tell a client that the session is
	being ended. Works like _client_end_session()
	(do_phase_end_session_last): prepare the right flags to be used for
	each clients via _client_end_session_last(). Note that we don't use all
	clients in the session here, but the list of clients that wanted to be
	ended last.
	We use a 10 seconds timeout for that phase to not block on clients that
	don't reply. Also, if there's no client in the session, then save the
	session if auto-save is enabled.
	(start_phase): empty the list of clients that wants to be ended last if
	it's not a relevant phase. Also handle new phase.
	(maybe_save_session): make this call valid in END_SESSION_LAST instead
	of END_SESSION
	(on_client_end_session_response): save the client in a specific list if
	it wants to be ended last.
	* gnome-session/gsm-xsmp-client.c: (xsmp_save_yourself_phase2):
	uncomment
	(xsmp_end_session): if the client is running last, then it means it's
	phase2 of SaveYourself, so use xsmp_save_yourself_phase2()

svn path=/trunk/; revision=5363