Configure bugzilla to reopen parent bug(s) if blocker reopened?

I'd like to configure bugzilla to reopen parent bugs if a blocker is reopened.

This, to me, seems to mirror the option I see of preventing a parent开发者_JAVA技巧 from being resolved if a child is not yet resolved, but I don't see an option to accomplish it.

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There is no such option. OP's request to add it was resolved as won't-fix with this comment:

Hmmm, I suspect that that would be better as an extension, because only a few organizations are going to want it.

No mention in the bug of anyone stepping up to contribute such an extension, though.