True fix for error in mimetype_guess, error introduced in original commit
2d00737489b8c61ed616b261c7c9bd314e2b0b41 and later fixed temporarily
by commenting out the line that caused error in commit
57bd4d3523efecf60197040cad34154aff4ddf80.
Gitweb now supports mime.types map $mimetypes_file relative to project.
Signed-off-by: Jakub Narebski <jnareb@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>