ipa-client-install: add support for Ed25519 SSH keys (RFC 7479)

https://fedorahosted.org/freeipa/ticket/5471

Reviewed-By: Martin Basti <mbasti@redhat.com>

ipapython/ssh.py

@@ -203,6 +203,8 @@ class SSHPublicKey(object):
             keytype = 2
         elif self._keytype.startswith('ecdsa-sha2-') and '@' not in self._keytype:
             keytype = 3
+        elif self._keytype == 'ssh-ed25519':
+            keytype = 4
         else:
             return
         fp = fpfunc(self._key).hexdigest().upper()