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: #16121 (closed)

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Edited by intrigeri