Scheduled maintenance 11/12th of May for supplementary SLRPNK services (including c/climate)

cross-posted from: https://slrpnk.net/post/9384953

On the weekend of the 11/12th of May the server which runs the XMPP, Movim and Wiki will undergo extended maintenance and will not be available for a few hours. We need to upgrade the main OS and improve some other things.

The main Lemmy service should not or only minimally affected and we will likely migrate the wiki over to that server to make it available more quickly again.

As usual, no exact time frame, but it will likely happen on Saturday or Sunday morning UTC timezone.