seeddb invalid ip crashes check connectivity

[John-Magne Bredal]

Traceback (most recent call last):

  File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 109, in get_response
    response = callback(request, *callback_args, **callback_kwargs)

  File "/usr/lib/python2.7/dist-packages/nav/web/seeddb/page/netbox/edit.py", line 232, in get_address_info
    address, None, 0, socket.SOCK_STREAM)

  File "/usr/lib/python2.7/encodings/idna.py", line 164, in encode
    result.append(ToASCII(label))

  File "/usr/lib/python2.7/encodings/idna.py", line 73, in ToASCII
    raise UnicodeError("label empty or too long")

UnicodeError: label empty or too long

<WSGIRequest
path:/seeddb/netbox/get-address-info/,
GET:<QueryDict: {u'address': [u'158..36.232.61']}>

[John-Magne Bredal (john-m-bredal)]

Fix here:
https://nav.uninett.no/hg/stable/rev/59d40a450882