Reminder, use stable branches for important bug fixes

[Martin Nowak via Digitalmars-d]

A small reminder, as the next point release isn't that far away, we're
now using stable branches to incorporate important bug fixes.

This means I won't look through master trying to identify relevant
commits. If there is anything that needs to go into 2.067.1 but was
accidentally merged into master, please make a pull request for stable
that cherry-picks this change.

-Martin