[Checkins] [zopefoundation/Products.ZCatalog] f2caa2: Rework request caching

[Dieter Maurer]

  Branch: refs/heads/rework_request_cache#94
  Home:   https://github.com/zopefoundation/Products.ZCatalog
  Commit: f2caa2c103c2e50db4966686ec815d6c57ebcbe5
      https://github.com/zopefoundation/Products.ZCatalog/commit/f2caa2c103c2e50db4966686ec815d6c57ebcbe5
  Author: dieter <dieter at handshake.de>
  Date:   2020-03-06 (Fri, 06 Mar 2020)

  Changed paths:
    M CHANGES.rst
    M src/Products/PluginIndexes/unindex.py

  Log Message:
  -----------
  Rework request caching