[2.1a4]Hostname label contains invalid characters

[Chris Gregan]

MAAS Fails to enlist nodes. Regiond shows odd django errors. Could be unrelated.

2016-09-27 23:32:51 [-] Unhandled Error
     raise TypeError('unexpected type %s for addr arg' % type(addr))
 builtins.TypeError: unexpected type <class 'NoneType'> for addr arg
   File "/usr/lib/python3/dist-packages/twisted/protocols/amp.py", line 1149, in checkKnownErrors
     key = error.trap(*command.allErrors)
     raise ValidationError(errors)
 django.core.exceptions.ValidationError: {'hostname': ["Label contains disallowed characters: 'fe80\\\\0580\\\\0580\\\\0580\\\\058eeb1\\\\058d7ff\\\\058fe8a\\\\058353c\\\\0376'."]}
2016-09-28 00:18:07 [-] Error on request (17) discovery.list: 'ascii' codec can't decode byte 0xc3 in position 2420: ordinal not in range(128)
 builtins.UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 2420: ordinal not in range(128)