GDB 9.1 release -- 2019-11-01 Update

[Joel Brobecker]

Hi Jonah,

> Can an update be done to the schedule (current/next) at the top of
> https://www.gnu.org/software/gdb/schedule/ please?

Yes, good point. I somehow thought that I had already done that before,
but clearly not. I took this opportunity to include the schedule for
GDB 10 as well, even though it's a bit early to think about it. It's
only tentative, and it's based on making major releases of GDB twice
yearly, minus a month to help avoid slippage over time.

> Also, as an irregular follower of the list and got commits I have noticed
> that we are jumping to 9.x, but is there a 9.0 release, or is the next
> release 9.1?

The release numbering is changing starting with this release cycle.
The 9.0[.x] numbering will be used for the pre-releases, and the first
official release will be 9.1, followed by the corrective release 9.2.

Each new release cycle will then increase the major version, and follow
the same logic as above.

The following wiki page summarizes the process (skip to the diagram
at the end):

    https://sourceware.org/gdb/wiki/Internals%20Versions

-- 
Joel