Look for nanosleep function.

Look for nanosleep function.

2001-06-07  Sebastian Wilhelmi  <wilhelmi@ira.uka.de>

	* configure.in: Look for nanosleep function.

	* gtimer.c: Use nanosleep for g_usleep, when found.

	* gtimer.c, gtimer.h: Add g_time_val_add function. Closes #54271.

	* gasyncqueue.c: Documentation updates.

	* gthreadpool.c: Use g_time_val_add now that we have it.

	* glib/glib-sections.txt, glib/tmpl/date.sgml: Add g_time_val_add.

	* glib/tmpl/threads.sgml: Updated.