Schleuder keys update cronjob fails for our lists at puscii

Originally created by @intrigeri on #16252 (Redmine)

Last Sunday I got this:

Refreshing all keys from the keyring of list tails-summit@boum.org resulted in this:

gpg: keyserver refresh failed: Cannot assign requested address

Parent Task: tails/sysadmin#16121

Edited May 15, 2020 by intrigeri