1 o Minor features (fallback directory mirrors):
2 - Give each fallback the same weight for client selection;
3 restrict fallbacks to one per operator;
4 report fallback directory detail changes when rebuilding list;
5 add new fallback directory mirrors to the whitelist;
6 update fallback directories based on the latest OnionOO data;
7 and any other minor simplifications and fixes.
8 Closes tasks 17158, 17905, 18749, bug 18689, and fixes part of
9 bug 18812 on 0.2.8.1-alpha; patch by "teor".