moonchen commented on PR #13510:
URL: https://github.com/apache/trafficserver/pull/13510#issuecomment-5242764286

   @JosiahWI Added — there is now a note under the `max_age` option:
   
   > Note that this option was incorrectly documented as ``max-age`` with a 
hyphen in previous
   > versions.  The code ignores ``max-age`` in all versions of this plugin.  
We have chosen
   > to keep the behavior the same and update the documentation, so that 
previously inert
   > configurations don't activate unexpectedly with an upgrade.
   
   Both halves of that are checkable in history, for the record. `max-age` has 
never been read as a configuration key — the only occurrences in 
`rate_limit.cc` are a debug log label, `"...max-age=%ldms..."`. And the two 
units have differed by a factor of 1000 since the YAML configuration arrived in 
#10559: that commit read `max_age` as `std::chrono::seconds` into a 
`std::chrono::milliseconds` member, while `--maxage` was already raw 
milliseconds. That is why the units are documented as they behave rather than 
made consistent.
   


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