Removed the ambiguous session_get0_current_payload() API. It is unclear whether the original packet payload or TCP reassembled payload is obtained.

It is recommended to:
* Use packet_get_payload() to obtain the original packet payload
* Use tcp_segment_get_data() to obtain the reassembled data

src/packet_io/dumpfile_io.cpp

@@ -205,7 +205,7 @@ static void *dumpfile_thread(void *arg)
             ATOMIC_SET(&handle->io_thread_wait_exit, 1);
         }
 
-        PACKET_IO_LOG_STATE("dumpfile io thread waiting");
+        PACKET_IO_LOG_STATE("dumpfile io thread waiting exit");
         sleep(1);
     }