[m-rev.] for review: Enable munmap support in Boehm GC by default.

[Julien Fischer]

Hi Peter,

On Tue, 30 Nov 2021, Peter Wang wrote:

> Julien, do you want me to wait until after the next ROTD before
> committing this?
>
> ----
>
> configure:
>    Change default value of enable_gc_mmap and enable_gc_munmap to yes.
>
>    Invert sense of --enable-gc-mmap and --enable-gc-munmap options in
>    the help text.
>
> NEWS:
>    Announce change.

You can go ahead and commit this one.

Julien.