* modules/ssl/ssl_private.h (SSLModConfigRec): Make szCryptoDevice

* modules/ssl/ssl_private.h (SSLModConfigRec): Make szCryptoDevice
  conditional on ENGINE API support.

* modules/ssl/ssl_engine_config.c (ssl_cmd_SSLCryptoDevice): Log a
  warning if the directive is used in a non-ENGINE OpenSSL build;
  only touch szCryptoDevice for with-ENGINE builds.

* modules/ssl/ssl_engine_init.c (ssl_init_server_certs): Only
  use szCryptoDevice for with-ENGINE builds.

Submitted by: Joe Orton <jorton redhat.com>

Github: closes #559

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1928874 13f79535-47bb-0310-9956-ffa450edef68