gitweb: accept trailing "/" in $project_list

The current code is removing the trailing "/", but computing the string length on the previous value, i.e. with the trailing "/". Later in the code, we do my $path = substr($File::Find::name, $pfxlen + 1); And the "$pfxlen + 1" is supposed to mean "the length of the prefix, plus 1 for the / separating the prefix and the path", but with an incorrect $pfxlen, this basically eats the first character of the path, and yields "404 - No projects found". While we're there, also fix $pfxdepth to use $dir, although a change of 1 in the depth shouldn't really matter. Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr> Signed-off-by: Junio C Hamano <gitster@pobox.com>