getlantern/lantern#1930 Limiting parallelism of masquerade verification,...

... and cleaning up on reconfigures
It's an interesting point.  My gut tells me that you're right, on the other hand it's not unusual for us to see dial times in the 10 second range, so if it takes that long just to dial ...  But like you say, we have a ton to choose from, so even if we filter out some because of transient issues that aren't their fault, it's not such a big deal.