Add a new address() API, check for null

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10629 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Make sure the request doesn't go out of scope when detecting RemoteEndpoint close

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@10630 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c