luci-app-ssr-plus: add other common dns in mainland China (#1201)

luci-app-ssr-plus/luasrc/model/cbi/shadowsocksr/client.lua

@@ -120,6 +120,10 @@ if is_finded("chinadns-ng") then
 	o:value("wan_114", translate("Use DNS from WAN and 114DNS"))
 	o:value("114.114.114.114:53", translate("Nanjing Xinfeng 114DNS (114.114.114.114)"))
 	o:value("119.29.29.29:53", translate("DNSPod Public DNS (119.29.29.29)"))
+	o:value("223.5.5.5:53", translate("AliYun Public DNS (223.5.5.5)"))
+	o:value("180.76.76.76:53", translate("Baidu Public DNS (180.76.76.76)"))
+	o:value("101.226.4.6:53", translate("360 Security DNS (China Telecom) (101.226.4.6)"))
+	o:value("123.125.81.6:53", translate("360 Security DNS (China Unicom) (123.125.81.6)"))
 	o:value("1.2.4.8:53", translate("CNNIC SDNS (1.2.4.8)"))
 	o:depends({pdnsd_enable = "1", run_mode = "router"})
 	o:depends({pdnsd_enable = "2", run_mode = "router"})