Patch to add codereview-review-own user right

Related to bug 27797

While reviewing your own code is bad practice, there are several instances I have run into on my instance of CodeReview where other people have checked code but not been bothered to mark it as OK in CodeReview.

This patch adds a new user right which by default is granted to only those in the svnadmins group. If the user has the right, it will let them mark their own revisions as OK like it did before bug 27797. If they don't, it won't have any effect on the current behaviour.

The expected use of this is to prevent users from marking their own revisions as OK, unless you're absolutely sure they already know this and won't ever mark their own revisions as OK without good reason.

This is a patch which I wrote specifically for my instance, but I'm submitting it here in case it's useful for someone else.

Version: unspecified
Severity: enhancement

Attached: