Back out broken but non-required hostname hash change

paramiko/hostkeys.py

@@ -141,8 +141,6 @@ class HostKeys (UserDict.DictMixin):
             if (hostname in e.hostnames) and (e.key.get_name() == keytype):
                 e.key = key
                 return
-        if not hostname.startswith('|1|') and hash_hostname:
-            hostname = self.hash_host(hostname)
         self._entries.append(HostKeyEntry([hostname], key))
 
     def load(self, filename):