relnote: remove the reference to `debugstrip`
The `debug` namespace is not intended for end user and advertising it is a path
to confusion and trouble. I think we should wait for the `admin` namespace to
exists and the command to be available as `admin--strip` before we advertise it.
Differential Revision: https://phab.mercurial-scm.org/D9817
graft c-ext
graft debian
graft zstd
graft tests
include make_cffi.py
include setup_zstd.py
include zstd.c
include LICENSE
include NEWS.rst