git commit mail now truncated to 1000 lines

[Brice Goglin <Brice.Goglin@ens-lyon.org>]

Hi,

Some git commit mails are dropped because they are too big for the list
(100kB). To be sure it does not happen again, I added "head -n 1000" to
the update hook on alioth. It's not very nice, but I think it's better
than not having any notification mail when a big change is committed. Of
course, if anybody wants to write a nice solution, feel free to so.

Brice