anchor.diff:  
   
   openssl_sane_dtls_alpn() ->
  -    case os:cmd("openssl version") of
  +    case portable_cmd("openssl", ["version"]) of
           "OpenSSL 1.1.0g" ++ _ ->
               false;
           "OpenSSL 1.1.1 " ++ _ ->
  
positive.code:     check_sane_openssl_renegotiate(Config).
  
  check_sane_openssl_renegotiate(Config) ->
      case os:cmd("openssl version") of  
  	"OpenSSL 1.0.0" ++ _ ->
  	    {skip, "Known renegotiation bug in OpenSSL"};
  	"OpenSSL 0.9.8" ++ _ ->
  
negative.code:     end. 
  
  check_openssl_npn_support(Config) ->
      HelpText = portable_cmd("openssl", ["s_client --help"]),
      case string:str(HelpText, "nextprotoneg") of
          0 ->
              {skip, "Openssl not compiled with nextprotoneg support"};
  