tcp: state machine improvements

- Add SYN_RCVD timeout
- Fix FIN_WAIT_1 to CLOSING transition

Change-Id: I42ca7fc087f6fdfae15bd7a6175dd3226ed341c7
Signed-off-by: Florin Coras <fcoras@cisco.com>
diff --git a/src/vnet/session/application.c b/src/vnet/session/application.c
index 78c41b9..bc837bb 100644
--- a/src/vnet/session/application.c
+++ b/src/vnet/session/application.c
@@ -329,7 +329,7 @@
     return rv;
 
   /* Store api_context for when the reply comes. Not the nicest thing
-   * but better allocating a separate half-open pool.  */
+   * but better than allocating a separate half-open pool. */
   tc->s_index = api_context;
 
   return 0;