Patches should be sent to the mailinglist. Patches created by git are preferred and much simpler to integrate. If git is not an option, you should create patches in unified diff format (diff -u) against the latest available daily snapshot.
When the patch has been applied, don't forget to update the DokuWiki Manual
. You can use a link to devel:develonly to inform users that this feature is not available in the latest stable release.