Summary

To support NR-310852 the APM agents will need to be able to add static key/value pairs to the log data being enriched/forwarded by the APM agents for each log message.

Acceptance Criteria

• Users are required to opt-in/enable custom tagging by enabling in agent configuration
• Agent default is off (will apply to new installations/customers)
• When the feature is enabled all label key/value pairs will be added to each log line
• This should apply however the labels are set (i.e. config file, startup option, environment variables)
• (Optional?) provide configuration to include/exclude labels.

https://new-relic.atlassian.net/browse/NR-317394