Github user zwoop commented on the issue:
https://github.com/apache/trafficserver/pull/882
Deprecated as of 6.2.0, removed for 7.0.0:
This plugin is deprecated as of v6.2.0 and will be removed as of v7.0.0. It
is replaced by a new Cache Key Manipulation Plugin and you should change your
configurations to use the new plugin instead. Please find some examples below
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