glibc git - Allow up to 500 commits in a push.

[Carlos O'Donell]

At Adhemerval's request I have raised the max commit email limit
to 500. We hit the limit when working on a larger set of changes
that exceeded 100 commits.

If we need a push with more than 100 commits then we can discuss
raising the limit again.

I expect that developers are filtering glibc-cvs and that a large
number of commit emails will not cause a problem.

If we want to review which branches create emails that's a
conversation we can have.

-- 
Cheers,
Carlos.