Support Tor 0.2.3.x control port event keyword reordering
Right now, the bandwidth auths are not going to work with Tor 0.2.3.x because for some reason we needed to deliberately break the control-spec.txt by reordering keywords... #3679 (moved) attempted to fix this by rewriting all of our event parsing, but that caused strange issues with the bw auths.
We should just try to update the regex instead, as a simpler change.
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