security/zeek: Update to 6.0.0

https://github.com/zeek/zeek/releases/tag/v6.0.0

This is the latest major version number Long-Term Support (LTS)
release of Zeek.

The NETMAP option has been removed; it was too difficult to build
it without zeek being installed in %%PREFIX%%. The consensus was
that this was a rarely used feature, please reach out to me if need
this (I've done some work on a new security/zeek-netmap port that
is probably the right way forward).

When I upgraded zeek on my systems I found some cruft left over
from previous versions. The way I recommend upgrading from 5.0.9
to 6.0.0 is:

service zeek stop
pkg delete -fy zeek py311-zkg
[clean up leftover files in /usr/local/lib/zeek]
pkg install -y zeek
service zeek deploy

Changes:

• Zeek now treats private address space (i.e., non-routable IP address ranges) as local by default
• Telemetry centralization and Prometheus exposition is not enabled by default anymore
• Custom source tarballs require a repo-info.json file.
• Plugin authors should raise the minimum required CMake version to 3.15 to ensure compatibility with new CMake scaffolding included in this release
• Zeek container images are not pushed to the zeekurity organization anymore
• The error message returned when using bro_init, bro_done, and bro_script_loaded events is now removed

Reported by: Tim Wojtulewicz