cp:
	PR c++/2645, DR 295
	* cp-tree.h (tsubst_flags_t): Add tf_ignore_bad_quals,
	tf_keep_type_decl.
	(make_typename_type): Use tsubst_flags_t.
	* decl.c (make_typename_type): Adjust. Return non-artificial
	TYPE_DECLs, if required.
	(grokdeclarator): Simplify CVR qualification handling. Allow bad
	qualifiers on typedef types.
	* decl2.c (handle_class_head): Adjust make_typename_type call.
	* parse.y (nested_name_specifier): Likewise.
	(typename_sub0): Likewise.
	(typename_sub1): Likewise.
	* pt.c (convert_template_argument): Adjust make_typename_type
	return value.
	(tsubst): Adjust cp_build_qualified_type_real calls.
	(check_cv_quals_for_unify): Cope with alowing bad qualifications
	on template type parms.
	(instantiate_decl): Recheck substitutions to give warnings on bad
	qualifications.
	* tree.c (cp_build_qualified_type_real): Use tf_allow_bad_quals.
testsuite:
	* g++.dg/template/qualttp19.C: New test.
	* g++.dg/template/qualttp20.C: New test.
	* g++.old-deja/g++.jason/report.C: Adjust expected errors
	* g++.old-deja/g++.other/qual1.C: Likewise.

From-SVN: r49961