"Couldn't set up any working nameservers. Network not up yet? Will try again soon."

When DNS fails, chutney can't verify any networks involving exits. This is really annoying on a plane, or for those who like to develop without a network connection.

We have 3 options here:

• configure chutney to allow broken DNS
• modify Tor to allow broken DNS in test networks
• add a fake DNS server (legacy/trac#19573 (moved))

Assigning this ticket to chutney until I'm sure we can't fix it by changing the torrc templates.