ACL evaluation on ADD operations (ITS#4556)

Currently, ACL evaluation doesn't behave the way people always expect on ADD operations (see ITS#4556). This has been fixed in HEAD, but not currently applied to RE24. I'm currently working on 2.4.13, and wanted to gather general feedback on whether or not it is thought this change should be included. It is a distinct change in behavior, and will break expected behavior for some folks.

Thanks, Quanah

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Quanah Gibson-Mount Principal Software Engineer Zimbra, Inc -------------------- Zimbra :: the leader in open source messaging and collaboration