Bug - If the only subscriber on a instance is banned, and unbanned, the unban doesn't federate to the instance.

hackertalks.com 0.19.11 - lone subscriber instance

lemmyworld.com 0.19.10 - ban and unban instance.

Single subscriber for a community gets banned, and a hour later gets unbanned. Since the subscriber is banned, the subscription appears to terminate. So there is no federation for the unban a hour later for that community.

note lemmy-federate doesn’t subscribe if there is a local subscriber either.

Example community:
- https://hackertalks.com/modlog/1540?page=1&actionType=All&userId=7663
- https://lemmy.world/modlog/622?page=1&actionType=All&userId=1161502