Support for OpenSSL 1.1.0:

- use new API SSL_CTX_set_max_proto_version()
  and SSL_CTX_set_min_proto_version() instead
  of SSL_CTX_set_options()
- use new methods TLS_client_method() and
  TLS_server_method()

Partial backport of r1735882 from trunk.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x-openssl-1.1.0-compat@1755849 13f79535-47bb-0310-9956-ffa450edef68