MINOR: listener: small API change

A minor API change was performed in listener(.c/.h) to restore consistency
between stop_listener() and (resume/pause)_listener() functions.

LISTENER_LOCK was never locked prior to calling stop_listener():
lli variable hint is thus not useful anymore.

Added PROXY_LOCK locking in (resume/pause)_listener() functions
with related lpx variable hint (prerequisite for #1626).

It should be backported to 2.6, 2.5 and 2.4

(cherry picked from commit 001328873c352e5e4b1df0dcc8facaf2fc1408aa)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 614f99ee0a9f71f85f12e88b0a113ede1e51ae40)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit e3b32c01df854610096487c1f1430224892248a4)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
diff --git a/src/protocol.c b/src/protocol.c
index 767e03a..1806bed 100644
--- a/src/protocol.c
+++ b/src/protocol.c
@@ -155,7 +155,7 @@
 	list_for_each_entry(proto, &protocols, list) {
 		list_for_each_entry_safe(listener, lback, &proto->receivers, rx.proto_list)
 			if (!listener->bind_conf->frontend->grace)
-				stop_listener(listener, 0, 1, 0);
+				stop_listener(listener, 0, 1);
 	}
 	HA_SPIN_UNLOCK(PROTO_LOCK, &proto_lock);
 }
@@ -175,7 +175,7 @@
 	HA_SPIN_LOCK(PROTO_LOCK, &proto_lock);
 	list_for_each_entry(proto, &protocols, list) {
 		list_for_each_entry(listener, &proto->receivers, rx.proto_list)
-			if (!pause_listener(listener))
+			if (!pause_listener(listener, 0))
 				err |= ERR_FATAL;
 	}
 	HA_SPIN_UNLOCK(PROTO_LOCK, &proto_lock);
@@ -197,7 +197,7 @@
 	HA_SPIN_LOCK(PROTO_LOCK, &proto_lock);
 	list_for_each_entry(proto, &protocols, list) {
 		list_for_each_entry(listener, &proto->receivers, rx.proto_list)
-			if (!resume_listener(listener))
+			if (!resume_listener(listener, 0))
 				err |= ERR_FATAL;
 	}
 	HA_SPIN_UNLOCK(PROTO_LOCK, &proto_lock);