session: optimize ct fifo segment allocations

Allocate per app pair segments with space for more than one fifo.

Type: feature

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: Ib96fe12b899cb14ff20c0be607814011e2c3fc6a
diff --git a/src/vnet/session/segment_manager.h b/src/vnet/session/segment_manager.h
index 3278d8d..ef8b970 100644
--- a/src/vnet/session/segment_manager.h
+++ b/src/vnet/session/segment_manager.h
@@ -90,6 +90,7 @@
  * @param sm	segment manager to be freed
  */
 void segment_manager_free (segment_manager_t * sm);
+void segment_manager_free_safe (segment_manager_t *sm);
 
 /**
  * Initiate segment manager cleanup