Specifies the key set id (8 hex digits representing
4 bytes: each pair is the value of the next byte).
May appear at most once. If not present, 00000000.
- Not yet suported in make-secnet-sites.
pkg GROUPIDHEX
pkgf GROUPIDHEX
pkgf indicates a fallback group.
May be repeated (with different id values).
If not specified, 00000000.
- Not yet suported in make-secnet-sites.
OUTPUT STRUCTURE