Implement DR 209

Implement DR 209

cp:
	Implement DR 209
	* cp-tree.h (skip_type_access_control,
	reset_type_access_control): Prototype.
	* decl.c (grokdeclarator): Access of friends is not checked.
	* parse.y (component_decl_list): Reset type access control.
	* semantics.c (decl_type_access_control): Clear
	current_type_lookups.
	(save_type_access_control): Don't save if not deferring.
	(skip_type_access_control, reset_type_access_control): New
	functions.
	(begin_class_definition): Do type access control for basetypes.
	Start deferred access control.
	(finish_class_definition): Resume immediate access control if
	this is a local class.
testsuite:
	* g++.old-deja/g++.other/friend12.C: New test.
	* g++.old-deja/g++.other/friend9.C: Expect no errors.
	* g++.old-deja/g++.robertl/eb56.C: Make typedef public.

From-SVN: r40841