Consolidate gssd and svcgssd since they share much code

	Remove directory svcgssd which was only created because the old
	build system could not handle building two daemons in the same
	directory.  This eliminates build complications since gssd and
	svcgssd also share many source files.

	This patch effectively removes the utils/svcgssd directory, moving
	all its files to the utils/gssd directory.  File utils/gssd/Makefile.am
	is modified with directions to build both gssd and svcgssd.