luci ssr plus: add multithreading cpu banlance for UDP relay

package/lean/luci-app-ssr-plus/Makefile

@@ -2,7 +2,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=luci-app-ssr-plus
 PKG_VERSION:=1
-PKG_RELEASE:=71
+PKG_RELEASE:=72
 
 PKG_CONFIG_DEPENDS:= CONFIG_PACKAGE_$(PKG_NAME)_INCLUDE_Shadowsocks \
 	CONFIG_PACKAGE_$(PKG_NAME)_INCLUDE_V2ray \

package/lean/luci-app-ssr-plus/root/etc/init.d/shadowsocksr

@@ -325,9 +325,10 @@ start_redir() {
       gen_config_file $UDP_RELAY_SERVER 1
       last_config_file=$CONFIG_UDP_FILE
       pid_file="/var/run/ssr-reudp.pid"
-      $ucmd \
-      -c $last_config_file $ARG_OTA -U \
-      -f $pid_file >/dev/null 2>&1
+      for i in $(seq 1 $threads)  
+      do 
+        $ucmd -c $last_config_file $ARG_OTA -U -f $pid_file >/dev/null 2>&1
+      done     
     elif [ "$utype" == "v2ray" ] ; then
         lua /usr/share/shadowsocksr/genv2config.lua $UDP_RELAY_SERVER udp $(uci_get_by_name $UDP_RELAY_SERVER local_port) > /var/etc/v2-ssr-reudp.json
         $ucmd -config /var/etc/v2-ssr-reudp.json >/dev/null 2>&1 &