mieru: add mtu and handshake_mode options

docs/configuration/inbound/mieru.md

@@ -19,6 +19,7 @@ icon: material/new-box
     }
   ],
   "traffic_pattern": "GgQIARAK",
+  "mtu": 1400
 }
 ```
 
@@ -47,3 +48,7 @@ A base64 string to fine tune network behavior.
 #### user_hint_is_mandatory
 
 If proxy client doesn't sent user hint, proxy server will refuse the connection.
+
+#### mtu
+
+Maximum transmission unit of L2 payload. Only applies to UDP transport egress traffic.

docs/configuration/inbound/mieru.zh.md

@@ -19,6 +19,7 @@ icon: material/new-box
     }
   ],
   "traffic_pattern": "GgQIARAK",
+  "mtu": 1400
 }
 ```
 
@@ -47,3 +48,7 @@ icon: material/new-box
 #### user_hint_is_mandatory
 
 客户端若不发送用户提示，代理服务器将拒绝连接。
+
+#### mtu
+
+L2 载荷的最大传输单元。仅适用于 UDP 传输方式的出站流量。

docs/configuration/outbound/mieru.md

@@ -20,6 +20,8 @@ icon: material/new-box
   "password": "hjkl",
   "multiplexing": "MULTIPLEXING_LOW",
   "traffic_pattern": "GgQIARAK",
+  "mtu": 1400,
+  "handshake_mode": "HANDSHAKE_STANDARD",
 
   ... // Dial Fields
 }
@@ -71,6 +73,14 @@ Multiplexing level. Supported values are `MULTIPLEXING_OFF`, `MULTIPLEXING_LOW`,
 
 A base64 string to fine tune network behavior.
 
+#### mtu
+
+Maximum transmission unit of L2 payload. Only applies to UDP transport egress traffic.
+
+#### handshake_mode
+
+Handshake mode when the client opens a connection. Allowed values are `HANDSHAKE_STANDARD` (1-RTT, wait for the proxy server to establish the connection to the destination before sending payload) and `HANDSHAKE_NO_WAIT` (0-RTT, send payload together with the connection to the proxy server).
+
 ### Dial Fields
 
 See [Dial Fields](/configuration/shared/dial/) for details.

docs/configuration/outbound/mieru.zh.md

@@ -20,6 +20,8 @@ icon: material/new-box
   "password": "hjkl",
   "multiplexing": "MULTIPLEXING_LOW",
   "traffic_pattern": "GgQIARAK",
+  "mtu": 1400,
+  "handshake_mode": "HANDSHAKE_STANDARD",
 
   ... // 拨号字段
 }
@@ -71,6 +73,14 @@ mieru 密码。
 
 一个 base64 字符串用于微调网络行为。
 
+#### mtu
+
+L2 载荷的最大传输单元。仅适用于 UDP 传输方式的出站流量。
+
+#### handshake_mode
+
+客户端建立连接时的握手模式。可设为 `HANDSHAKE_STANDARD`（1-RTT，客户端等待代理服务器建立到目标地址的连接后再发送载荷）或 `HANDSHAKE_NO_WAIT`（0-RTT，客户端在连接代理服务器的同时发送载荷）。
+
 ### 拨号字段
 
 参阅 [拨号字段](/zh/configuration/shared/dial/)。