0.6.12.16:

0.6.12.16:
	made LOAD handle EXTERNAL-FORMAT just the same way as
		COMPILE-FILE already did, refusing any value other
		than :DEFAULT
	removed unused (and deprecated on OpenBSD) setregid/setreuid
		stuff
	converted "i386" to "__i386__" at various
		"egrep 'def.*[^_]i386'" locations
	added src/runtime/trymap.c (and noted that trymap fails for
		the mapped area which the OpenBSD port uses for its
		control stack, so now the mystery is no longer why
		the OpenBSD port now complains about memory faults,
		but why the OpenBSD port ever worked in the past)