[master] cde002016 silence flexelint "vsa.h not used"

[Nils Goroll]

commit cde002016c68a88cdb0a82dc3635a4ae4be1e493
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Wed Nov 18 16:54:28 2020 +0100

    silence flexelint "vsa.h not used"
    
    it does not register use via tbl/sess_attr.h

diff --git a/bin/varnishd/cache/cache_session.c b/bin/varnishd/cache/cache_session.c
index f927538fd..5c5f94b20 100644
--- a/bin/varnishd/cache/cache_session.c
+++ b/bin/varnishd/cache/cache_session.c
@@ -35,6 +35,7 @@
  * sess fields, for instance ->fd being negative ->reason.
  *
  */
+//lint -e{766}
 
 #include "config.h"