feature: support lookup local network host name or ip via mDNS

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

@@ -350,6 +350,9 @@ msgstr "日志数量"
 msgid "Log File"
 msgstr "日志文件路径"
 
+msgid "mDNS Lookup"
+msgstr "mDNS查询"
+
 msgid "Marking Packets"
 msgstr "数据包标记"
 
@@ -434,6 +437,9 @@ msgstr "解析本地主机名"
 msgid "Resolve local hostnames by reading Dnsmasq lease file."
 msgstr "读取Dnsmasq的租约文件解析本地主机名。"
 
+msgid "Resolve local network hostname via mDNS protocol."
+msgstr "使用mDNS协议解析本地网络主机名。"
+
 msgid "Response Mode"
 msgstr "响应模式"
 

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

@@ -239,7 +239,7 @@ o.cfgvalue    = function(...)
     return Flag.cfgvalue(...) or "1"
 end
 
--- cache-size
+-- resolve local hostname
 o = s:taboption("advanced", Flag, "resolve_local_hostnames", translate("Resolve Local Hostnames"), translate("Resolve local hostnames by reading Dnsmasq lease file."))
 o.rmempty     = false
 o.default     = o.enabled
@@ -247,6 +247,14 @@ o.cfgvalue    = function(...)
     return Flag.cfgvalue(...) or "1"
 end
 
+-- resolve local network hostname via mDNS
+o = s:taboption("advanced", Flag, "mdns_lookup", translate("mDNS Lookup"), translate("Resolve local network hostname via mDNS protocol."))
+o.rmempty     = true
+o.default     = o.disabled
+o.cfgvalue    = function(...)
+    return Flag.cfgvalue(...) or "0"
+end
+
 -- Force AAAA SOA
 o = s:taboption("advanced", Flag, "force_aaaa_soa", translate("Force AAAA SOA"), translate("Force AAAA SOA."))
 o.rmempty     = true