Fix for https://java.net/jira/browse/JSIP-418 (duplicate https://java.net/jira/browse/JSIP-452)

git-svn-id: https://svn.java.net/svn/jsip~svn/trunk@2282 8e71dc83-d81e-6649-80f2-80b843a9b2be
Revert to UDP example to match the context

git-svn-id: https://svn.java.net/svn/jsip~svn/trunk@2283 8e71dc83-d81e-6649-80f2-80b843a9b2be