1 o Major bugfixes (vanguards):
2 - Rotate to a new L2 vanguard whenever an existing one loses the
3 Stable or Fast flag. Previously, we would leave these relays in the
4 L2 vanguard list but never use them, and if all of our vanguards
5 end up like this we wouldn't have any middle nodes left to choose
6 from so we would fail to make onion-related circuits. Fixes bug
7 40805; bugfix on 0.4.7.1-alpha.