[CentOS] Submitting patches from upstream fixes/bugs

What is the preferred method for submitting patches from upstream projects ?
 I have two patches for libvirt-0.8.1.el6_0.6.  One adds ESX 4.1 support to
things like virt-v2v (
http://www.redhat.com/archives/libvir-list/2010-July/msg00480.html) and the
second fixes the broken "virsh snapshot-create" (
https://bugzilla.redhat.com/show_bug.cgi?id=727709).  All I did really was
get them to work with the CentOS 6 version of libvirt.

Thanks
- Trey
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