[PATCH] commit-email.pl to produce mbox messages to stdout

Hi,

I've modified tools/hook-scripts/commit-email.pl.in to produce mbox
formated output if stdout is defined instead of sendmail or smtp_server.

This format is useable by mailman's arch tool to recreate an archive
from scratch. Without the leading 'From ' line the created output is not
recognized as mbox. If no 'Date: ' line is included mailman's arch uses
the current date for every message.

Lars