Update documentation

docs/configuration/outbound/wireguard.md

@@ -7,6 +7,8 @@
   
   "server": "127.0.0.1",
   "server_port": 1080,
+  "system_interface": false,
+  "interface_name": "wg0",
   "local_address": [
     "10.0.0.2/32"
   ],
@@ -38,6 +40,16 @@ The server address.
 
 The server port.
 
+#### system_interface
+
+Use system tun support.
+
+Requires privileges and cannot conflict with system interfaces.
+
+#### interface_name
+
+Custom device name when `system_interface` enabled.
+
 #### local_address
 
 ==Required==

docs/configuration/outbound/wireguard.zh.md

@@ -7,6 +7,8 @@
 
   "server": "127.0.0.1",
   "server_port": 1080,
+  "system_interface": false,
+  "interface_name": "wg0",
   "local_address": [
     "10.0.0.2/32"
   ],
@@ -38,6 +40,16 @@
 
 服务器端口。
 
+#### system_interface
+
+使用系统 tun 支持。
+
+需要特权且不能与系统接口冲突。
+
+#### interface_name
+
+启用 `system_interface` 时的自定义设备名称。
+
 #### local_address
 
 ==必填==