* NEWS: Describe the following change briefly.

* NEWS: Describe the following change briefly.
* bootstrap.conf (gnulib_modules): Remove stat-macros; no longer
needed.
* gzip.c: Don't include stat-macros.h; no longer needed.
(treat_file): Refuse to compress files that are setuid, or setgid,
as this can in theory lead to security holes.  Also, refuse to
compress files with the sticky bit set, on general principle.
(copy_stat): Don't copy the setuid, setgid, or sticky bits,
as (given the above change) they'll always be zero here.
Invoke chmod before chown, to close a race condition.