[MINOR] cookie: add support for the "preserve" option
This option makes haproxy preserve any persistence cookie emitted by
the server, which allows the server to change it or to unset it, for
instance, after a logout request.
(cherry picked from commit 52e6d75374c7900c1fe691c5633b4ae029cae8d5)
diff --git a/include/types/proxy.h b/include/types/proxy.h
index 246a9be..f4fd4a9 100644
--- a/include/types/proxy.h
+++ b/include/types/proxy.h
@@ -148,6 +148,7 @@
#define PR_O2_EXP_RSTR 0x02000000 /* http-check expect rstring */
#define PR_O2_EXP_TYPE 0x03800000 /* mask for http-check expect type */
#define PR_O2_EXP_INV 0x04000000 /* http-check expect !<rule> */
+#define PR_O2_COOK_PSV 0x08000000 /* cookie ... preserve */
/* end of proxy->options2 */
/* bits for sticking rules */