Create /opt/so/conf/zeek/zkg directory and sync custom packages
from the manager via file.recurse. Bind mount the directory into
the so-zeek container so the entrypoint can install packages on
startup.
JA4 (BSD licensed) remains always enabled, but JA4+ variants (JA4S,
JA4D, JA4H, JA4L, JA4SSH, JA4T, JA4TS, JA4X) require a FoxIO license
and are now toggleable via the SOC UI. The toggle includes a license
agreement warning and defaults to disabled.