2008-06-11  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/tr1_impl/hashtable (_Hashtable<>::cbegin(size_type),
	cend(size_type)): Add per DR 691. 
	* testsuite/23_containers/unordered_map/requirements/cliterators.cc:
	New.
	* testsuite/23_containers/unordered_multimap/requirements/
	cliterators.cc: Likewise.
	* testsuite/23_containers/unordered_set/requirements/cliterators.cc:
	Likewise.
	* testsuite/23_containers/unordered_multiset/requirements/
	cliterators.cc: Likewise.
	* doc/xml/manual/intro.xml: Add an entry for DR 691.

From-SVN: r136685