How to offer a patch

All, I've made some mods to auditctl to allow it to read a directory of 'rule files'. The idea is that within an enterprise, one would distribute a standard /etc/audit/audit.rules which can be updated from the corporate repository. Should a system require localized audit rules, then a directory containing files of rules can be maintained locally. The reasoning for a directory as opposed to just an additional file is to offer granularity of 'rule sets'. I would like to know the convention for patching to this list. Should I git clone the svn repository then supply a git diff? Can I just provide an old-fashioned diff -rupN or C_ALL=C TZ=UTC0 diff -Naur? Regards Burn Alting