Added log policies to support Zeek log filtering.

[kkvarfordt]

🗣 Description

Add global log policy attributes to the logging streams. This enables Zeek log filtering on the contents of the log files as well as which log files are generated.

https://docs.zeek.org/en/master/frameworks/logging.html#filtering-log-records

💭 Motivation and context

Motivated by ICSNPP issue cisagov/ICSNPP#14

[kkvarfordt]

Example Zeek script with associated hook for removing the generation the opcua-binary-status-code-detail.log file.

File: log-killer.zeek

hook ICSNPP_OPCUA_Binary::log_policy_status_code_detail(rec: OPCUA_Binary::StatusCodeDetail,  id: Log::ID, filter: Log::Filter) { break; }

Example Command:

zeek -Cr ../tests/traces/open62541_client-server_mainloop.pcap icsnpp/opcua-binary ../log-killer.zeek