If you weren't connected to a given router, and you made a directory
request to it simultaneously with a new web query that caused you to
want to connect to that OR... it would think you're already connected.
svn:r135
prkey is only fetched when it's needed
tor nodes who aren't dirservers now fetch directories and autoconnect
to new nodes listed in the directory
default role is a non-dirserver node
svn:r120