appletviewer has no netscape.javascript.JSObject, so applets that touch
JavaScript fail to load, and Java 8 denies applets the URLPermission they
need to fetch through an HTTP proxy. Add a JSObject stand-in with a working
document.cookie and a policy granting HTTP URL access.
Runs a Flashpoint game natively in a container and streams it to the
browser. fp-launch follows the Linux launcher's sequence: start the game
server, mount the game's zip, and run startJava.sh through the proxy.