Putting an early exit if statement at the top instead of wrapping the
whole file contents unbreaks unit test configs, as was discovered for
SysId. It reduces nesting as well.
Unused plugins were removed from the beginnings of files as well.
Provides an implementation of a XRP-specific plugin that sends binary messages over UDP (to account for the less performant hardware on the XRP).
This plugin leverages the work already done for the WebSocket protocol and does a translation to/from JSON/binary.
