[RFC] Stopping those fat "What's cooking in git.git" threads

Hi,

As far as I remember, it was Petr Baudis who first asked on IRC if
these threads (being so big and deep) are annoying for other people as
well or not.

I think it's just hard to follow the discussion as the subject is
usually not changed, so for example when the subject contains "merge", I
carefully read that mail, but I can easily miss such a mail if it's
still "What's cooking in".

An other problem with deep threads is that it just doesn't fit in one's
screen, so I had to use tricks for example to see if a mail was a reply
to my mail or to some other mail.

So here is what I thought about: What about if everyone (except Junio,
of course) would change the subject _and_ remove the In-Reply-To: header
when replying to those mails?

If those large threads just annoys a few people and most people are
happy with the current situation then sorry for the noise.

Thanks.