fix wrong to stamp in message

lib/io.js

@@ -250,7 +250,7 @@ class Request {
 
   relay (value, to, opts) {
     const socket = (opts && opts.socket) || this.socket
-    const buffer = this._encodeRequest(null, value, socket)
+    const buffer = this._encodeRequest(null, value, to, socket)
     socket.send(buffer, 0, buffer.byteLength, to.port, to.host)
   }
 
@@ -258,7 +258,7 @@ class Request {
     if (this.destroyed) return
 
     if (this.socket === null) return
-    if (this._buffer === null) this._buffer = this._encodeRequest(this.token, this.value, this.socket)
+    if (this._buffer === null) this._buffer = this._encodeRequest(this.token, this.value, this.to, this.socket)
 
     if (!force && this._io.congestion.isFull()) {
       this._io._pending.push(this)
@@ -323,7 +323,7 @@ class Request {
     socket.send(state.buffer, 0, state.buffer.byteLength, from.port, from.host, onflush)
   }
 
-  _encodeRequest (token, value, socket) {
+  _encodeRequest (token, value, to, socket) {
     const id = this._io.ephemeral === false && socket === this._io.serverSocket
     const state = { start: 0, end: 1 + 1 + 6 + 2, buffer: null } // (type | version) + flags + to + tid
 
@@ -340,7 +340,7 @@ class Request {
     state.buffer[state.start++] = (id ? 1 : 0) | (token ? 2 : 0) | (this.target ? 4 : 0) | (value ? 8 : 0)
 
     c.uint16.encode(state, this.tid)
-    peer.ipv4.encode(state, this.to)
+    peer.ipv4.encode(state, to)
 
     if (id) c.fixed32.encode(state, this._io.table.id)
     if (token) c.fixed32.encode(state, token)