doc: Clarify multiple forget policies get ORed

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Matt Holt 2018-05-23 17:28:02 -06:00 committed by GitHub
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@ -164,6 +164,9 @@ The ``forget`` command accepts the following parameters:
years, months, and days, e.g. ``2y5m7d`` will keep all snapshots made in the
two years, five months, and seven days before the latest snapshot.
Multiple policies will be ORed together so as to be as inclusive as possible
for keeping snapshots.
Additionally, you can restrict removing snapshots to those which have a
particular hostname with the ``--hostname`` parameter, or tags with the
``--tag`` option. When multiple tags are specified, only the snapshots