Add hangup handler for Originate, expose state handlers in general. Various fixes.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@14861 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/languages/mod_managed/managed/ChannelVariables.cs

@@ -103,7 +103,7 @@ namespace FreeSWITCH.Native {
             /*** Times ***/
             const string created_time = "created_time";
             const string answered_time = "answered_time";
-            const string hangup_time = "hangup_time";
+            const string hangup_time = "hungup_time";
             const string progress_time = "progress_time";
             const string transfer_time = "transfer_time";