Zink MR signoff tags

[Alyssa Rosenzweig]

+ for not requiring rb/ab tags ... I kinda like the s-o-b tags but those
don't require fiddly rebases, just -s in the right place..

On Tue, Oct 04, 2022 at 10:44:31PM -0500, Mike Blumenkrantz wrote:
>    Hi,
>    After some vigorous and robust discussion with Erik, we've decided that
>    zink will no longer require any rb/ab/etb tags to be applied to patches in
>    MRs.
>    Following in Turnip's footsteps, any MR that receives sufficient reviewage
>    in gitlab comments can be merged directly with no further action
>    necessary.
>    Mike