c++config: Remove __regex nested namespace.

c++config: Remove __regex nested namespace.

2012-06-27  Benjamin Kosnik  <bkoz@redhat.com>

	* include/bits/c++config: Remove __regex nested namespace.
	* include/bits/regex_compiler.h: Change __regex to
	__detail. Adjust doxygen markup, add regex-details group.
	* include/bits/regex_constants.h: Same.
	* include/bits/regex_cursor.h: Same.
	* include/bits/regex_error.h: Same.
	* include/bits/regex_grep_matcher.h: Same.
	* include/bits/regex_grep_matcher.tcc: Same.
	* include/bits/regex_nfa.h: Same.
	* include/bits/regex_nfa.tcc: Same.
	* include/bits/regex.h: Same. Remove static from global constants.

	* testsuite/ext/profile/mutex_extensions_neg.cc: Adjust line numbers.

	* include/bits/locale_classes.tcc: Add use_facet, has_facet to
	locales group.

From-SVN: r189039