2006-11-23  Federico Mena Quintero  <federico@novell.com>

	Use the write-to-a-pipe trick from the signal handler instead of
	queueing an idle handler from there.

	* src/nautilus-main.c (setup_debug_log_signals): Set up a pair of
	pipes for the SIGUSR1 handler; set up a GIOChannel on them.
	(sigusr1_handler): Write a byte to our pipe instead of queueing an
	idle handler.
	(debug_log_io_cb): Replaces dump_debug_log_idle_cb().  Read from
	the pipe, and dump the debug log.

	Add a configuration file for the logging mechanism.  You create
	~/nautilus-debug-log.conf as a GKeyFile.

	* libnautilus-private/nautilus-debug-log.c
	(nautilus_debug_log_load_configuration): New function; loads the
	configuration from a key file like this:

		[debug log]
		enable domains = foo; bar; baz
		max lines = 1000

	* libnautilus-private/nautilus-debug-log.c (dump_configuration):
	New utility function.
	(nautilus_debug_log_dump): At the end of the log, d...