[RFC]: Repurpose glibc_X.Y keyword to mean "Fixed in glibc X.Y release branch"

[DJ Delorie]

Joseph Myers <joseph@codesourcery.com> writes:
> Fixed in X.Y, or fixed in X.Y *after the release*?

Or worse, "Fixed in X.Y, but only for Debian, which has rebased, and not
Fedora, which hasn't yet, unless it's after Thursday."

Which is the typical problem when the release and the release info are
stored separately.