Earlier, 452e225 (gitweb: fix esc_param, 2009-10-13) fixed CGI escaping
rules used in esc_url. A very similar logic exists in esc_param and needs
to be fixed the same way.
Signed-off-by: Pavan Kumar Sunkara <pavan.sss1991@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>