Change 625776 had a related patch set uploaded (by Ammarpad; owner: Ammarpad):
[mediawiki/extensions/FlaggedRevs@master] Use array_plus merge strategy to allow overriding default values

https://gerrit.wikimedia.org/r/625776

Actually I don't think the ExtensionRegistration system supports this. None of the five supported merge strategies appear to allow this, so this will require patch in core. So for now consider the above patch as not a full solution, but at least it would allow this inelegant trick to work (as proposed by Robert Vogel)

$wgFlaggedRevsNamespaces = [ NS_HELP, -99, -99 ];

You'll have to remember to add or remove some dummy replacements though, whenever the extension's default changes

Thanks a lot! Can you please make sure this finds its way to REL1_35 also?

Another instance of T142663: ExtensionRegistry does not allow complete override of config variables e.g. flat arrays

In T142663#3556317, @Legoktm wrote:

I thought I had left a comment on this ticket earlier, in general I don't like encouraging full overrides. Defaults should be sane, and full overrides end up require needing more maintenance later on. If the defaults aren't sane, that's a different problem. Flat arrays have always been problematic since you need to write some amount of code to be able to remove a single item from them, and we are trying to move away from code in configuration.

Thanks @Reedy, so it appears this has simply been declined.

In T262196#6442275, @Osnard wrote:

Thanks a lot! Can you please make sure this finds its way to REL1_35 also?

I will cherry-pick it if approved. Especially given the full solution has already been declined T142663.

Change 625776 abandoned by Ammarpad:
[mediawiki/extensions/FlaggedRevs@master] Use array_plus merge strategy to allow overriding default values

Reason:

https://gerrit.wikimedia.org/r/625776

Why has the patchset been abandoned?

In T262196#6727539, @Osnard wrote:

Why has the patchset been abandoned?

There are no reviewers

In T262196#6727759, @Ammarpad wrote:

In T262196#6727539, @Osnard wrote:

Why has the patchset been abandoned?

There are no reviewers

Would you like to reapply the patch it if I try to get somebody to review it?

Yes