gpg: Accept also armored data from the WKD.

* g10/keyserver.c (keyserver_import_wkd): Clear NO_ARMOR.

We may even adjust the specs to allow that. It should not be a
problem for any OpenPGP implementation because armored keys are very
common and de-armoring code is de-facto a mandatory feature.

• Signed-off-by: Werner Koch <wk@gnupg.org>