Use standard JDK logging configuration, refactor LogPolicy into a
dedicated JDK logging Formatter
Manually merged pull request #41 from sophokles73/logging-improvement and updated LOGGERs. Increased to 0.18.2.
Fixed argument override.
Added example logging configuration file.
Added CaliforniumLogger back to enable static logging config without VM arguments and config file.
Fixed multi-line logging when newline in payload.
Reduced test logging level.
Fixed missing DTLS endpoint for cf-secure.