This bug was fixed in the package python-django - 1.8.7-1ubuntu5
--------------- python-django (1.8.7-1ubuntu5) xenial; urgency=medium
* Backport b1afebf882db5296cd9dcea26ee66d5250922e53 for ticket 26204 from upstream (1.8.10) to allow dashes in TLDs again (in the URL validator.) LP: #1528710
-- LaMont Jones <email address hidden> Mon, 11 Apr 2016 17:30:48 -0600
This bug was fixed in the package python-django - 1.8.7-1ubuntu5
---------------
python-django (1.8.7-1ubuntu5) xenial; urgency=medium
* Backport b1afebf882db529 6cd9dcea26ee66d 5250922e53 for ticket 26204 from
upstream (1.8.10) to allow dashes in TLDs again (in the URL validator.)
LP: #1528710
-- LaMont Jones <email address hidden> Mon, 11 Apr 2016 17:30:48 -0600