427068 ServletContext.getClassLoader should only check privileges if a SecurityManager exists
426750 Handle autoclose on async writes
Made sure that the number of selectors cannot be zero.
If ClientContainer is being stopped, then we can unregister it from
the ShutdownThread.

This happens when ClientContainer is added as a managed bean to a
ContainerLifeCycle and the container is stopped.
427128 - Cookies are not sent to the server.

Implemented/fixed handling of cookies sent by client to server.
427254 - Cookies are not sent to the client.

Introduced ServletUpgradeResponse.complete(), called when the response
is about to be sent to the client, to transfer the headers stored in
the superclass (UpgradeResponse.headers) into the HttpServletResponse.
427245  StackOverflowError when session cannot be de-idled from disk
[426003] active modules with missing dependencies fail accordingly, non-active with missing deps fail silently
426750 isReady() returns true at EOF
427512 - ReadPendingException in case of HTTP Proxy tunnelling.

Fixed by marking the old HttpConnection as "soft closed", that is
make it so that isClosed() returns true but the underlying EndPoint
is not closed.
This allows the HttpReceiver to skip the registration for fill
interest, so that the ReadPendingException is not thrown.
Renamed NetworkTrafficSelectChannelConnector to
NetworkTrafficServerConnector and deprecated the old class.
Merge remote-tracking branch 'upstream/master' into quick-start