Drop the -X.Y versioning

[Henrique de Moraes Holschuh]

On Thu, 26 Jun 2014, Ondřej Surý wrote:
> I suggest we drop the -X.Y versioning for next cyrus major release.
> 
> I think our migration scripts are mostly robust to handle the
> transitions,
> so I don't see any reason to keep those versions side to side.
> 
> Objections? Comments? Appraisals? :)

Well, it will be more difficult to go back to -x.y later if we change our
mind.

I'd say the real question is: are we going to keep two concurrent versions
of cyrus imap in unstable?  If yes, we should keep -x.y.  Otherwise, the
need isn't that strong and we could drop the -x.y entirely.

We should keep in mind that nowadays cyrus really is much easier to update
even between major releases, often handling all the on-disk update by itself
on access, and that downgrading is _not_ supported.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh