user.cfg.in: Update to Doxygen 1.8.0.

2012-03-08  Benjamin Kosnik  <bkoz@redhat.com>

	    * doc/doxygen/user.cfg.in: Update to Doxygen 1.8.0.
	    * include/bits/locale_facets.h: Adjust markup to avoid warnings.
	    * include/ext/pb_ds/assoc_container.hpp: Same.
	    * include/ext/pb_ds/priority_queue.hpp: Same.
	    * include/std/fstream: Same.
	    * include/std/ratio: Same.
	    * testsuite/20_util/ratio/cons/cons_overflow_neg.cc: Adjust line
	    numbers.
	    * testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Same.

Co-Authored-By: Ramana Radhakrishnan <ramana@gcc.gnu.org>

From-SVN: r185094