Github user bryancall commented on the issue:
https://github.com/apache/trafficserver/pull/761
Having a throttling setting to work would mean that it would need to be
lower then the combination of the incoming and outgoing connection settings. I
think it is confusing to have another option for liming connections I believe
people will get the throttling wrong. The goal of reworking the connection
limits was a to reduce the number of settings.
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