[2.3.x] Changes for https://java.net/jira/browse/GRIZZLY-1601 (Introduce a method that users may invoke within a Main method to start the server, but prevent main method from exiting.) and https://java.net/jira/browse/GRIZZLY-1602 (State transitions in HttpServer/NetworkListener methods start() and shutdownNow() appear to be occurring too early within the method call.)
[2.3.x] Thought I removed that...