* nix/nix-daemon/guix-daemon.cc (options)[!HAVE_CHROOT]: Mention that
`--disable-chroot' has no effect.
(main)[!HAVE_CHROOT]: Set `useChroot' to false.
* nix/libutil/md5.h (MD5_Final): Pass RESBUF as the first argument to
`guix_hash_final'.
* nix/libutil/sha1.h (SHA1_Final): Likewise.
* nix/libutil/sha256.h (SHA256_Final): Likewise.