Redesign/Rewrite the BridgeAuthority
There have been an increasing number of problems lately with the BridgeAuthority (see i.e. legacy/trac#11216 (moved) legacy/trac#12254 (moved) legacy/trac#15866 (moved)). Yawning and I have been discussing rewriting it at some point, and it's possible that the entire idea of the BridgeAuthority should be rethought/redesigned.