oops pardon

In other words, we'd have an increasing level of instability with an odd
release number, depending on how long-term the instability is.

- 2.6.< even >: even at all levels, aim for having had minimally intrusive
patches leading up to it (timeframe: a week or two)

with the odd numbers going like:

- 2.6.< odd >: still a stable kernel, but accept bigger changes leading up
to it (timeframe: a month or two).
- 2.< odd >.x: aim for big changes that may destabilize the kernel for
several releases (timeframe: a year or two)
- < odd >.x.x: Linus went crazy, broke absolutely _everything_, and rewrote
the kernel to be a microkernel using a special message-passing version
of Visual Basic. (timeframe: "we expect that he will be released from
the mental institution in a decade or two").