chore: add a code comment for tproxy listener

listener/tproxy/tproxy.go

@@ -46,6 +46,9 @@ func New(addr string, tunnel C.Tunnel, additions ...inbound.Addition) (*Listener
 			inbound.WithSpecialRules(""),
 		}
 	}
+	//TODO: When we upgrade the major version of go.mod to 1.24 or higher, disable mptcp for tproxy.
+	//      Golang will then enable mptcp support for listeners by default.
+	//      This can cause tproxy to malfunction on certain Linux kernel versions.
 	l, err := net.Listen("tcp", addr)
 	if err != nil {
 		return nil, err