PR c++/60167
	PR c++/60222
	PR c++/58606
	* parser.c (cp_parser_template_argument): Restore dereference.
	* pt.c (template_parm_to_arg): Dereference non-pack expansions too.
	(process_partial_specialization): Handle deref.
	(unify): Likewise.

From-SVN: r207994