Fix Wake-on-LAN: Implement custom WOL with OS-specific broadcast support

internal/wol/enable_broadcast_windows.go

@@ -0,0 +1,21 @@
+//go:build windows
+
+package wol
+
+import (
+	"net"
+
+	"golang.org/x/sys/windows"
+)
+
+func enableBroadcast(conn *net.UDPConn, debug bool) error {
+	raw, err := conn.SyscallConn()
+	if err != nil {
+		return err
+	}
+	var setErr error
+	raw.Control(func(fd uintptr) {
+		setErr = windows.SetsockoptInt(windows.Handle(fd), windows.SOL_SOCKET, windows.SO_BROADCAST, 1)
+	})
+	return setErr
+}