Comment 4 for bug 1434611

The check made in https://review.openstack.org/#/c/163033/, breaks browser based serial consoles. I see in the patch where it has a special allowance to let non browser based serial console work.

Horizon added a browser serial console in Kilo https://review.openstack.org/#/c/144659, which is now broken. We need someone from Nova to look at that check and see what can be done.