2008-04-08  Vincent Untz  <vuntz@gnome.org>

	Completely rewrite the way we detect the system timezone. It will work
	on more distributions this way. Also the code is better and it helps
	improve the world.
	Good thing is that now the clock will always immediately update after
	the timezone is updated.

	* Makefile.am: add new files
	* system-timezone.[ch]: new file, implement a singleton that knows how
	to read the system timezone and that monitors it
	* clock-location.[ch]: (clock_location_new): don't get the TZ
	environment variable here
	(files_are_identical):
	(recursive_guess_zone):
	(guess_zone_from_tree):
	(parse_etc_sysconfig_clock):
	(monitor_etc_sysconfig_clock):
	(zone_from_etc_sysconfig_clock):
	(clock_location_guess_zone): killed
	(clock_location_init): updated to create the SystemTimezone object
	(clock_location_finalize): updated
	(clock_location_unset_tz): use system_timezone_get_env() instead of a
	local variable
	(clock_location_is_current_timezone): use system_timezone_get()
	(clock_location_get_offset): use clock_location_unset_tz() instead of
	duplicating code
	(make_current_cb): updated to remove the current timezone handling
	* clock-zoneinfo.h: move SYSTEM_ZONEINFODIR to system-timezone.h
	* clock-zonetable.c: add new include
	* clock.c: add a SystemTimezone object
	(destroy_clock): unref it
	(clock_timezone_changed): new, handle system timezone change
	(fill_clock_applet): create the SystemTimezone object and connect to
	its changed signal

	* clock-marshallers.list: remove marshallers that already exist in glib
	* clock-location.[ch]: (clock_location_class_init): updated for this

svn path=/trunk/; revision=11016