cvsserver: Do not include status output for subdirectories if -l is passed

This effectively implements the -l switch by pruning the entries whose
filenames contain a path separator.  It was previously ignored.

Without this, TkCVS includes strange "ghost" entries in its directory
listings.

Signed-off-by: Damien Diederen <dash@foobox.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-cvsserver.perl

@@ -1428,6 +1428,8 @@ sub req_status
     {
         $filename = filecleanup($filename);
 
+        next if exists($state->{opt}{l}) && index($filename, '/', length($state->{prependdir})) >= 0;
+
         my $meta = $updater->getmeta($filename);
         my $oldmeta = $meta;