If one tries to fetch a key over wkd and there already is an earlier expired
version of that key in the local keyring gnupg doesn't re-fetch the key. This
doesn't seem to make sense, because it'll mean an expired key can never be
updated over wkd.
* Import attached key, which is expired (a new version is provided over wkd).
* Try to import:
gpg --auto-key-locate=wkd --locate-key [emailaddress]
It'll just show the expired key.