ProxyListener - Initialize dport to none if diverter.getOriginalDestPort does not return a destination port.

Feature enhancements
- Added ability to send logs to Splunk using HEC
- Modified the listeners to use the same logger instance
- Modified listeners to log key session information using json format

Known issues
- logger.name is not unique to each listener, which makes following the logs difficult
- Logging json formatted logs to streamhandler/filehandler is not very useful.

- Extended logging capabilities to include remote syslog and Splunk loggers.
- Implemented remote logger feature to ListenerBase
- Splunk loggers are configure with a filter to drop all non-json messages
- Log messages for remote loggers are created using Common Information Model when applicable
- Improved logging consistency across most listeners
- Each listener instance is created with its own stream and remote logger (if configured)
- Added log and log_cmd to TLS_FakeFTPHander

Bugfix
- Fixed SSL configuration of SMTP listener

ToDo
- Improve banner and server configuration for SMTP listener, similar to FTPListener

…enerBase.

- Added ability to specify more than one remote loggers
- Added json_only flag to offer the ability to avoid logging JSON to syslog.

…ers.

…ger = [1|0]

Fixed type in ProxyListener.  Renamed log_mesage to log_message.

…ged if remote logger is not set.

… and too much noise.

…sage under high load.

…gEnhancements

…ilter out JSON.

Additionally, addressed the issue of excluding json output in listener stream handler.

…gEnhancements

# Conflicts:
#	fakenet/listeners/ListenerBase.py

…on root logger

…pecification to 1|0 from true|false.