When we increment the Open vSwitch version number, we tend to forget to
update it in debian/changelog at the same time. Right now this gets
fixed up automatically at "make dist" time, but it's even better if we can
always have it be correct in the repository. This commit should help with
that, by making both "make" and "make dist" refuse to proceed if the
version number is out of sync.
Invariably we forget to update the version number in debian/changelog as
we change OVS's own version number. This is embarrassing.
This commit introduces two different times to automatically update the
debian/changelog version number: whenever boot.sh runs and whenever
"make dist" runs. In the latter case, only the version number in the
distributed tarball is updated, but that seems OK.
Reported by Joan Cirer <joan@ev0.net> most recently, and by others over
the last year or so too.
