Why:
* The maintenance script RemoveProtectedFlagFromFilter was added
to fix a mistake where a filter was 'protected' that shouldn't
be.
* There are certain steps that should be taken before and after
the script is run. These are not yet documented.
What:
* Document that the script should only be run after checking that
no data will be leaked.
* Document that a note should be left for filter editors to
explain when and why the script was run.
Bug: T380290
Change-Id: Iffe35c87782fdd499937565f1f8da62bfd36f93d
Why:
* Protected variables were introduced to support temporary accounts
so that temporary users could be filtered based on their IP address.
* Filters that use protected variables are protected in order to
preserve privacy. This can't be undone.
* It is mistakenly possible to protect a filter that does not use
protected variables (T378553). We need a mechanism to fix these
mistakes.
What:
* Introduce a maintenance script that takes a filter ID and, if the
filter is protected, sets it to unprotected while maintaining any
other existing privacy levels.
Bug: T378551
Change-Id: I4dfe3970221397d5be5ea0697490d8c8e3726adf
