openssl about docker-rust

[sfackler]

OpenSSL headers are already present:

$ docker run --rm rust:1.21.0 head /usr/include/openssl/opensslv.h
/*
 * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#ifndef HEADER_OPENSSLV_H

[dessalines]

This issue is flaring up again, when the target is x86_64-unknown-linux-musl