* config/mt/mt.c (mt_override_options): Require lower case
	architectures.  Revert accidental default to ms2.
	* config/mt/mt.h (ASM_SPEC, LIBSPEC, STARTFILE_SPEC,
	ENDFILE_SPEC): Require lower case architectures.  Revert default
	to ms2.

	* doc/invoke.texi (MT Options): Rename and update.
	* doc/md.texi (MorphoTech family): Rename and update.

From-SVN: r108581