The section discusses $gitweb_export_ok and $gitweb_list, but gitweb
Perl code does not have such variables (this likely hangs over from
GITWEB_EXPORT_OK and GITWEB_LIST respectively). Fix the section to
spell $export_ok and $projects_list like the rest of the document.
Signed-off-by: Denis Ovsienko <denis@ovsienko.info> Signed-off-by: Junio C Hamano <gitster@pobox.com>