Add kcp DNS masquerade support (#4368)

V2rayNG/app/src/main/java/com/v2ray/ang/dto/V2rayConfig.kt

@@ -257,7 +257,9 @@ data class V2rayConfig(
                 var header: HeaderBean = HeaderBean(),
                 var seed: String? = null
             ) {
-                data class HeaderBean(var type: String = "none")
+                data class HeaderBean(
+                    var type: String = "none",
+                    var domain: String? = null)
             }
 
             data class WsSettingsBean(
@@ -385,6 +387,11 @@ data class V2rayConfig(
                         } else {
                             kcpsetting.seed = seed
                         }
+                        if (host.isNullOrEmpty()) {
+                            kcpsetting.header.domain = null
+                        } else {
+                            kcpsetting.header.domain = host
+                        }
                         kcpSettings = kcpsetting
                     }
 

V2rayNG/app/src/main/res/values/arrays.xml

@@ -43,6 +43,7 @@
         <item>wechat-video</item>
         <item>dtls</item>
         <item>wireguard</item>
+        <item>dns</item>
     </string-array>
 
     <string-array name="mode_type_grpc" translatable="false">