System/Api/Tcp: Make s->close() work on bound sockets

System/Api/Tcp.HC

@@ -25,6 +25,7 @@ class TcpSocket {
     U64 send_buffer_filled;
     U64 send_buffer_kick; // We set this to 1 when we have data available to net,
                           // Net sets back to 0 when ready to receive
+    U64 close_kick;       // We set this to 1 to force close the connection
     U0 (*close)();
     U64 (*receive)(U64 buf, U64 length);
     U0 (*send)(U64 buf, U64 length);
@@ -103,6 +104,7 @@ U0 @tcp_socket_close(TcpSocket* s)
         Free(s->receive);
     if (s->send)
         Free(s->send);
+    s->close_kick = 1;
     s->state = TCP_SOCKET_STATE_CLOSED;
 }