When LearnCircuitBuildTimeout is off, we should ignore (most?)( CBT parameters from the consensus
circuit_build_times_get_initial_timeout() and some related functions look at cbtmintimeout and other consensus parameters, and get invoked even when we have LearnCircuitBuildTimeout set.
When LearnCircuitBuildTimeout is off, we should probably be more circumspect about which parameters we use. In particular, we should not apply any changes to a user configured CircuitBuildTimeout value in this case.
Reported by wanoskarnet