New function, suggested by Havoc earlier this month. (g_mkstemp): Use only

New function, suggested by Havoc earlier this month. (g_mkstemp): Use only

2000-11-11  Tor Lillqvist  <tml@iki.fi>

	* gfileutils.c (g_file_open_tmp): New function, suggested by Havoc
	earlier this month.
	(g_mkstemp): Use only one case for letters in temp file name, as
	this will be used on systems with case-insensitive file systems.

	* testglib.c (main): Test g_mkstemp() and g_file_open_tmp().