acinclude.m4, [...]: Change sourceware.cygnus.com and sources.redhat.com URLs for...

acinclude.m4, [...]: Change sourceware.cygnus.com and sources.redhat.com URLs for libstdc++ web...

	* acinclude.m4, configure.in, mkcheck.in,
	testsuite/21_strings/ctor_copy_dtor.cc,
	testsuite/21_strings/inserters_extractors.cc,
	testsuite/23_containers/map_operators.cc,
	testsuite/23_containers/vector_element_access.cc,
	testsuite/25_algorithms/lower_bound.cc,
	testsuite/27_io/ifstream_members.cc,
	testsuite/27_io/istream_extractor_arith.cc,
	testsuite/27_io/istream_unformatted.cc,
	testsuite/27_io/ofstream_members.cc,
	testsuite/27_io/ostream_inserter_char.cc,
	testsuite/27_io/ostream_inserter_other.cc,
	testsuite/27_io/ostream_manip.cc, testsuite/27_io/streambuf.cc:
	Change sourceware.cygnus.com and sources.redhat.com URLs for
	libstdc++ web pages and list archives to point to gcc.gnu.org
	* aclocal.m4, configure: Regenerate.

From-SVN: r38428