haproxy: Rework hotplug script for HAProxy

- Migrated init-script to procd.
- Removed the old hotplug script as it is unnecessary and
  caused long boot-times for r7800 and possibly others.

Signed-off-by: Christian Lachner <gladiac@gmail.com>

net/haproxy/files/haproxy.init

@@ -1,29 +1,25 @@
 #!/bin/sh /etc/rc.common
-# Copyright (C) 2009-2010 OpenWrt.org
+# Copyright (C) 2009-2019 OpenWrt.org
 
 START=99
 STOP=80
 
-SERVICE_USE_PID=1
+USE_PROCD=1
+
 EXTRA_COMMANDS="check"
 
 HAPROXY_BIN="/usr/sbin/haproxy"
 HAPROXY_CONFIG="/etc/haproxy.cfg"
-HAPROXY_PID="/var/run/haproxy.pid"
 
-start() {
-	service_start $HAPROXY_BIN -q -D -f "$HAPROXY_CONFIG" -p "$HAPROXY_PID"
-}
-
-stop() {
-	kill -9 $(cat $HAPROXY_PID | tr "\n" " ")
-	service_stop $HAPROXY_BIN
-}
-
-reload() {
-	$HAPROXY_BIN -D -q -f $HAPROXY_CONFIG -p $HAPROXY_PID -sf $(cat $HAPROXY_PID)
+start_service() {
+	procd_open_instance
+	procd_set_param respawn
+	procd_set_param file "$HAPROXY_CONFIG"
+	procd_set_param reload_signal USR2
+	procd_set_param command $HAPROXY_BIN -q -W -db -f "$HAPROXY_CONFIG"
+	procd_close_instance
 }
 
 check() {
-        $HAPROXY_BIN -c -q -V -f $HAPROXY_CONFIG
+	$HAPROXY_BIN -c -q -V -f $HAPROXY_CONFIG
 }