Clear the write_tag as well so we don't double-cancel it. #43395.

Clear the write_tag as well so we don't double-cancel it. #43395.

        * libsoup/soup-message.c (soup_message_requeue): Clear the
        write_tag as well so we don't double-cancel it. #43395.

        * libsoup/soup-queue.c (soup_queue_error_cb): The connection might
        be destroyed by the end of the func, so we have to call
        soup_connection_set_used at the beginning.

        * libsoup/soup-openssl.c (soup_openssl_read, soup_openssl_write):
        Call g_set_error() so that we don't SEGV immediately after
        returning G_IO_STATUS_ERROR.