[2.3.x] Incremental changes for https://java.net/jira/browse/GRIZZLY-1546 (Ref GRIZZLY-1345. Generalize the graceful shutdown to be a feature of the core transport vs specific to http-server).
 - Fix copy/paste issue.
[2.3.x] Incremental changes for https://java.net/jira/browse/GRIZZLY-1546 (Ref GRIZZLY-1345. Generalize the graceful shutdown to be a feature of the core transport vs specific to http-server).
[2.3.x] Incremental changes for https://java.net/jira/browse/GRIZZLY-1546 (Ref GRIZZLY-1345. Generalize the graceful shutdown to be a feature of the core transport vs specific to http-server).
[2.3.x] Incremental changes for https://java.net/jira/browse/GRIZZLY-1546 (Ref GRIZZLY-1345. Generalize the graceful shutdown to be a feature of the core transport vs specific to http-server).
[2.3.x] Incremental changes for https://java.net/jira/browse/GRIZZLY-1546 (Ref GRIZZLY-1345. Generalize the graceful shutdown to be a feature of the core transport vs specific to http-server).
 - Rename ShutdownListener to GracefulShutdownListener
[2.3.x] Revert all changes for https://java.net/jira/browse/GRIZZLY-1546 so that we can release 2.3.4.
[maven-release-plugin] prepare release 2_3_4
[maven-release-plugin] prepare for next development iteration
[2.3.x] Reapply all changes for https://java.net/jira/browse/GRIZZLY-1546 as a single commit now that 2.3.4 has been released.