--base-path-relaxed option

--base-path-relaxed option

I switched git.kernel.dk to --base-path a few minutes ago, to get rid of
a /data/git postfix in the posted urls. But transitioning is tricky,
since now all old paths will fail miserably.

So I added this --base-path-relaxed option, that will make git-daemon
try the absolute path without prefixing --base-path before giving up.
With this in place and --base-path-relaxed added, both my new url of

    git://git.kernel.dk/linux-2.6-block.git

and the old

    git://git.kernel.dk/data/git/linux-2.6-block.git

work fine.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>