announcement about GDB version numbering

[Joel Brobecker <brobecker at adacore dot com>]

Hello everyone,

This is to confirm that, following the GDB 8.3 and 8.3.1 releases,
GDB will be moving to a new version numbering scheme, where
the major version number gets incremented each time a new release
branch gets created. This is the result of a couple of public
discussions:
  - between GDB contributors and maintainers at the 2018 GNU Cauldron
  - on this mailing-list:
    RFC: Changing GDB's version numbering scheme
    https://www.sourceware.org/ml/gdb-patches/2018-09/msg00256.html
  - and a final confirmation by private discussion between Global
    Maintainers.

So, to give a brief overview, version numbers will look like this
(the .90 versions are pre-releases):

  - [old scheme]  8.2.90,  8.3,  8.3.1
  - [new scheme]  9.0.90,  9.1,  9.2
  - [new scheme] 10.0.90, 10.1, 10.2
  - [new scheme] 11.0.90, 11.1, 11.2

The reason why the next release will follow the old scheme is because
we're too close to branching for me to be ready (I use a collection of
scripts to make the release), and also it avoids having us make some
changes e.g. in Bugzilla.

-- 
Joel