windows: make sure sockets and handles are reset on close

Set the socket to INVALID_SOCKET foir TCP and UDP handles and
the handle to INVALID_HANDLE_VALUE on TTY handles after closing them.

src/win/tcp.c

@@ -196,6 +196,7 @@ void uv_tcp_endgame(uv_loop_t* loop, uv_tcp_t* handle) {
 
     if (!(handle->flags & UV_HANDLE_TCP_SOCKET_CLOSED)) {
       closesocket(handle->socket);
+      handle->socket = INVALID_SOCKET;
       handle->flags |= UV_HANDLE_TCP_SOCKET_CLOSED;
     }
 
@@ -1368,6 +1369,7 @@ void uv_tcp_close(uv_loop_t* loop, uv_tcp_t* tcp) {
 
   if (close_socket) {
     closesocket(tcp->socket);
+    tcp->socket = INVALID_SOCKET;
     tcp->flags |= UV_HANDLE_TCP_SOCKET_CLOSED;
   }
 

src/win/tty.c

@@ -1903,6 +1903,7 @@ void uv_tty_close(uv_tty_t* handle) {
   if (handle->flags & UV_HANDLE_READING)
     uv_tty_read_stop(handle);
 
+  handle->handle = INVALID_HANDLE_VALUE;
   handle->flags &= ~(UV_HANDLE_READABLE | UV_HANDLE_WRITABLE);
   uv__handle_closing(handle);
 

src/win/udp.c

@@ -144,6 +144,7 @@ int uv_udp_init(uv_loop_t* loop, uv_udp_t* handle) {
 void uv_udp_close(uv_loop_t* loop, uv_udp_t* handle) {
   uv_udp_recv_stop(handle);
   closesocket(handle->socket);
+  handle->socket = INVALID_SOCKET;
 
   uv__handle_closing(handle);