Update

vendor/tailscale.com/net/wsconn/wsconn.go

@@ -2,9 +2,7 @@
 // SPDX-License-Identifier: BSD-3-Clause
 
 // Package wsconn contains an adapter type that turns
-// a websocket connection into a net.Conn. It a temporary fork of the
-// netconn.go file from the github.com/coder/websocket package while we wait for
-// https://github.com/nhooyr/websocket/pull/350 to be merged.
+// a websocket connection into a net.Conn.
 package wsconn
 
 import (
@@ -14,11 +12,11 @@ import (
 	"math"
 	"net"
 	"os"
-	"sync"
 	"sync/atomic"
 	"time"
 
 	"github.com/coder/websocket"
+	"tailscale.com/syncs"
 )
 
 // NetConn converts a *websocket.Conn into a net.Conn.
@@ -104,7 +102,7 @@ type netConn struct {
 	reading           atomic.Bool
 	afterReadDeadline atomic.Bool
 
-	readMu sync.Mutex
+	readMu syncs.Mutex
 	// eofed is true if the reader should return io.EOF from the Read call.
 	//
 	// +checklocks:readMu