Module tor_circmgr::timeouts

Code for estimating good values for circuit timeouts.

We need good circuit timeouts for two reasons: first, they help user experience. If user wait too long for their circuits, or if they use exceptionally slow circuits, then Tor will feel really slow. Second, these timeouts are actually a security property.

Enums

• Action
  A possible action for which we can try to estimate a timeout.