CONTRIB: debug: fix a few flags definitions

Commit f4cfcf9 ("MINOR: debug/flags: Add missing flags") added a number
of missing flags but a few of them were incorrect, hiding real values.
This can be backported to 1.8.
diff --git a/contrib/debug/flags.c b/contrib/debug/flags.c
index db601aa..558072f 100644
--- a/contrib/debug/flags.c
+++ b/contrib/debug/flags.c
@@ -43,8 +43,8 @@
 	SHOW_FLAG(f, AN_REQ_FLT_XFER_DATA);
 	SHOW_FLAG(f, AN_REQ_FLT_END);
 
-	SHOW_FLAG(f, AN_REQ_FLT_START_FE);
-	SHOW_FLAG(f, AN_REQ_FLT_START_BE);
+	SHOW_FLAG(f, AN_RES_FLT_START_FE);
+	SHOW_FLAG(f, AN_RES_FLT_START_BE);
 	SHOW_FLAG(f, AN_RES_INSPECT);
 	SHOW_FLAG(f, AN_RES_WAIT_HTTP);
 	SHOW_FLAG(f, AN_RES_STORE_RULES);
@@ -127,8 +127,6 @@
 	SHOW_FLAG(f, CO_FL_WAIT_L6_CONN);
 	SHOW_FLAG(f, CO_FL_WAIT_L4_CONN);
 	SHOW_FLAG(f, CO_FL_CONNECTED);
-	SHOW_FLAG(f, CO_FL_NOTIFY_DATA);
-	SHOW_FLAG(f, CO_FL_NOTIFY_DONE);
 	SHOW_FLAG(f, CO_FL_ERROR);
 	SHOW_FLAG(f, CO_FL_SOCK_WR_SH);
 	SHOW_FLAG(f, CO_FL_SOCK_RD_SH);