stl_vector.h (vector::_Alloc_traits): Make private.

stl_vector.h (vector::_Alloc_traits): Make private.

	* include/bits/stl_vector.h (vector::_Alloc_traits): Make private.
	* include/debug/vector: Add allocator-extended constructors, ensure
	move assignment and swap have same allocator propagation semantics
	and exceptions specification as base class.
	* include/profile/vector: Likewise.
	(vector::push_back(_Tp&&)): Forward argument as rvalue.
	* testsuite/23_containers/vector/debug/alloc_prop.cc: New.
	* doc/xml/manual/status_cxx2011.xml: Clarify status of container
	requirements with respect to allocators.
	(status.iso.200x): Add anchor for old ID to preserve existing links.

From-SVN: r181189