Add plugin version numbers.

To leave unspecified is dangerously vague. Maven issues a warning.
Update Fred version.
Fix build.

In Fred 1f56cca52c7b3af68dd606138b8796ce5e37bdff added a publicGateway
boolean argument to the constructor. At this level, it may be necessary
to bind to different ports or use a different wrapper depending on the
request source IP. For the time being, hardcoding something is
sufficient.