add socket so cleanup happens

git-svn-id: file:///home/svn/framework3/trunk@10566 4d416f70-5f16-0410-b530-b9f4589650da

lib/net/ssh/transport/session.rb

@@ -76,6 +76,7 @@ module Net; module SSH; module Transport
             }
           )
         }
+        options[:msfmodule].add_socket(@socket)
       end
 
       @socket.extend(PacketStream)