ADDED: method/1 and disable_methods/1 options to ssl_context/3
PORT: SSLv2_method() is not provided on all SSL installations.
Raise a domain_error if the requested method is not available. Also move the checking into ssl4pl from ssllib to simplify raising this exception. Add sslv23 as an explicit option so it can be handled uniformly
Merge pull request #1 from SWI-Prolog/master

Test