anchor.diff:  %%   certificate is considered valid).</dd>
   %%  <dt>ip</dt><dd>Interface to listen on. Listen on all interfaces
   %%   by default.</dd>
  +%%  <dt>key</dt><dd>Optional. The DER encoded users private key. If this option
  +%%   is supplied it will override the keyfile option.</dd>
   %%  <dt>keyfile</dt><dd>Optional. Path to the file containing the user's
   %%   private PEM encoded key.</dd>
   %%  <dt>next_protocols_advertised</dt><dd>Optional. Erlang R16B+ required.
  
positive.code: 	ssl:listen(0, ranch:filter_options(Opts2,
  		[backlog, cacertfile, cacerts, cert, certfile, ciphers,
  			fail_if_no_peer_cert, ip, key, keyfile, next_protocols_advertised,
  			nodelay, password, port, raw, verify],
  		[binary, {active, false}, {packet, raw},
  			{reuseaddr, true}, {nodelay, true}])).
  
  
negative.code: %%  <dt>password</dt><dd>Optional. String containing the user's password.
  %%   All private keyfiles must be password protected currently.</dd>
  %%  <dt>port</dt><dd>TCP port number to open. Defaults to 0 (see below)</dd>
  %%  <dt>reuse_session</dt><dd>Optional. Enables the ssl server to have a local
  %%   policy for deciding if a session should be reused or not, only meaningful
  %%   if reuse_sessions is set to true.</dd>
  %%  <dt>reuse_sessions</dt><dd>Optional. Specifies if the server should agree
  %%   to reuse sessions when the clients request to do so.</dd>
  %%  <dt>secure_renegotiate</dt><dd>Optional. Specifies if to reject renegotiation
  %%   attempt that does not live up to RFC 5746. By default secure_renegotiate is
  %%   set to false i.e. secure renegotiation will be used if possible but it will
  %%   fallback to unsecure renegotiation if the peer does not support RFC 5746.</dd>
  %%  <dt>verify</dt><dd>Optional. If set to verify_peer, performs an x509-path
  %%   validation and request the client for a certificate.</dd>
  %%  <dt>verify_fun</dt><dd>Optional. The verify fun will be called during the
  %%   X509-path validation when an error or an extension unknown to the ssl
  %%   application is encountered. Additionally it will be called when a certificate
  %%   is considered valid by the path validation to allow access to each certificate
  %%   in the path to the user application.</dd>
  %% </dl>
  %%
  %% You can listen to a random port by setting the port option to 0.
  