Hello everyone,
For a long time now, we have had the default behaviour of admins can unblock themselves if blocked.
In my opinion, this is a poor default. In the event of a compromised admin account, the compromised account can just unblock themselves and continue being malicious.
To that end, and in light of some recent admin accounts being compromised, we now disallow admins to unblock themselves. This doesn't apply to self blocks - Admins who block themselves can still unblock themselves. However admins who are blocked by other admins can no longer unblock themselves.
I'm still open to communities who want to continue to have the old behaviour to opt out of the new behaviour - The primary thing here is that the default has now changed, so that anywhere that was using the old behaviour for no other reason then it was the default is now using the new behaviour.
-- Brian Wolff ([[User:BWolff_(WMF)]]) Wikimedia Security Team