* Allow trusted proxy via APP_TRUSTED_PROXIES
Set to '*' by default to emulate legacy behavior.
Set up doc describing environment variables
* Create helper to parse environment variables into arrays properly.
* Update doc blocks
* Updates to snmptrap handling
fix a bug in findDeviceByIP. Add more tests for that.
Move handle outside of the Trap class, it doesn't fit.
Add developer docs.
* fix tests copy paste issue.
* Fix findByIp when port may not exist.
* Logging: Output context (and extra) if they exist
* Generic trap event logging and new config setting.
