mainpage.html: Bring up to date.

2003-04-29  Phil Edwards  <pme@gcc.gnu.org>

	* docs/doxygen/mainpage.html:  Bring up to date.
	* docs/doxygen/run_doxygen:  Cosmetic tweaks.  Work around a bug
	in Doxygen.
	* docs/doxygen/user.cfg.in:  Scanning the precompiled headers
	breaks everything.  Don't scan them.
	* docs/html/documentation.html:  Point to "Write after approval"
	notes.

From-SVN: r66270