luci: add response mode option

package/luci-compat/files/luci/i18n/smartdns.zh-cn.po

@@ -180,6 +180,15 @@ msgstr "文件类型"
 msgid "Filtering IP with blacklist"
 msgstr "使用IP黑名单过滤"
 
+msgid "First Ping"
+msgstr "最快PING"
+
+msgid "Fastest IP"
+msgstr "最快IP"
+
+msgid "Fastest Response"
+msgstr "最快响应"
+
 msgid "Force AAAA SOA"
 msgstr "停用IPV6地址解析"
 
@@ -311,6 +320,9 @@ msgstr "重启"
 msgid "Restart smartdns"
 msgstr "重启服务"
 
+msgid "Response Mode"
+msgstr "响应模式"
+
 msgid "Second Server Settings"
 msgstr "第二DNS服务器"
 
@@ -420,6 +432,14 @@ msgstr "测速模式"
 msgid "Smartdns speed check mode. "
 msgstr "SmartDns测速模式设置。"
 
+msgid ""
+"Smartdns response mode, First Ping: return the first ping IP, "
+"Fastest IP: return the fastest IP, Fastest Response: return the fastest "
+"DNS response."
+msgstr ""
+"SmartDNS响应模式，最快PING： 返回最早有ping结果的IP，速度适中；最快IP： "
+"返回最快IP，查询请求可能延长； 最快响应：返回最快响应的结果。查询请求时间短。"
+
 msgid ""
 "Specify an IP address to return for any host in the given domains, Queries "
 "in the domains are never forwarded and always replied to with the specified "

package/luci-compat/files/luci/model/cbi/smartdns/smartdns.lua

@@ -102,6 +102,16 @@ function o.validate (section_id, value)
     return value
 end
 
+---- response mode;
+o = s:taboption("advanced", ListValue, "response_mode", translate("Response Mode"), 
+    translate("Smartdns response mode, First Ping: return the first ping IP, Fastest IP: return the fastest IP, Fastest Response: return the fastest DNS response."))
+o.rmempty     = true
+o.placeholder = "default"
+o:value("", translate("default"))
+o:value("first-ping", translate("First Ping"))
+o:value("fastest-ip", translate("Fastest IP"))
+o:value("fastest-response", translate("Fastest Response"))
+
 ---- Enable TCP server
 o = s:taboption("advanced", Flag, "tcp_server", translate("TCP Server"), translate("Enable TCP DNS Server"))
 o.rmempty     = false