Binary package “apache2-ssl-dev” in ubuntu zesty

Apache HTTP Server (mod_ssl development headers)

 The Apache HTTP Server Project's goal is to build a secure, efficient and
 extensible HTTP server as standards-compliant open source software. The
 result has long been the number one web server on the Internet.
 This package provides the development header and the dependencies for
 modules that interact with mod_ssl's internal openssl state.