[v3] manual link checks

[Benjamin Kosnik]

For XML:
Runs W3C's link check against the docs, fixes up some issues there
(Seem like mailto markup is the biggest remaining offender for actual
errors, which seems minor.) And then I manually inspected (ugh) the
latest-doxygen links to re-point them where they are supposed to go.
There's got to be a better way to cross-link between doxygen and
docbook.  Some minor additions to content.

For doxygen:
I removed some excess markup brought over from the profile-patch, and
then when double checking the man pages, noticed that C++0x nested
types were not being rewritten to "outer::inner" from "outer_inner"
like the previous nested types. Fixed.

tested x86/linux

-benjamin
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 20100111-1.patch
Type: text/x-patch
Size: 22702 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20100112/0bc48426/attachment.bin>