[v3 patch] update references to CVS in libstdc++ docs

[Benjamin Kosnik]

Thanks for this Jonathan. 

> Following http://gcc.gnu.org/ml/libstdc++/2007-09/msg00088.html this
> does the same for the libstdc++ documentation.
> 
> There are three broken links to old CVS testsuite files in
> http://gcc.gnu.org/onlinedocs/libstdc++/20_util/allocator.html
> I don't know where the files are in the current testsuite, so I
> haven't fixed those links.

Hmm. 

Are you talking about the bits here: "Three synthetic benchmarks have
been created that provide data that is used to compare different C++
allocators. These tests are:"

These links work for me, but should be updated to point at the
SVN copies.

ie:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libstdc%2b%2b-v3/testsuite/performance/20_util/allocator/Attic/insert.cc

to

http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libstdc%2b%2b-v3/testsuite/performance/23_containers/insert/sequence.cc

> OK to commit?

Yes please. 

-benjamin