start of the GDB 11 release cycle

[Joel Brobecker <brobecker@adacore.com>]

Hello,

It's been about 6.5 months since we made the first GDB 10 release (10.1).
So I propose we start the process of creating the GDB 11 release now.

As of now, below are the issues that I'm aware of:

  * [Sergey with Simon as reviewer] <PR tdep/26633>
    Add Z80 CPU support
    https://sourceware.org/bugzilla/show_bug.cgi?id=26633

    Patch submitted at:
    https://sourceware.org/pipermail/gdb-patches/2020-September/172083.html

  * [AndrewB/Simon] <PR gdb/26819>
    Bug 26819 - RISC-V: internal-error: int finish_step_over(execution_control_state*): Assertion
    https://sourceware.org/bugzilla/show_bug.cgi?id=26819

    I think the situation has been improved thanks to a couple of
    patches, but the user still has some scenarios where the issue
    happens.

  * [Simon] <PR gdb/26868>
    Follow-up on x86-64 stub submission
    https://sourceware.org/bugzilla/show_bug.cgi?id=26868

    This is the submission in question:
    https://sourceware.org/pipermail/gdb-patches/2020-November/173182.html

  * [Simon/Kevin] <PR gdb/27526>
    Attaching to threaded process on glibc 2.33: libthread_db fails to initialize with "generic error"

    Patch v2 at:
    https://sourceware.org/pipermail/gdb-patches/2021-May/178485.html

Are there other issues or last minute features we'd like to include
before we branch and/or release?

Thank you!
-- 
Joel