[ruby-core:58645] Short-term 1.9.2 maintainership

Greetings ruby-core,

We just started this conversation on the security mailing list, but I'm
moving it here so more people can contribute to the discussion. Yugui is
no longer maintaining (or has expressed that she no longer wishes to
maintain) the 1.9.2 branch going forward. Since this change wasn't
announced very publicly before it happened I'm afraid people may be
caught off guard and may not be prepared to upgrade. I'd like to take
over maintainership of 1.9.2 for a short period of time; as for how long
the branch should continue on is up for discussion. 3-6 months seems
reasonable to me, not sure how people feel about that?

Hopefully this will get the conversation started. Once we have a
decision made it'd probably make sense to announce an exact date so
people know when 1.9.2 will no longer receive security fixes.

-Sam