Description:
------------
if you are going to use curl_setopt() to force an SSL version you need to
know some magic constants.  libcurl provides constants to make this easy:
    CURL_SSLVERSION_DEFAULT
    CURL_SSLVERSION_TLSv1
    CURL_SSLVERSION_SSLv2
    CURL_SSLVERSION_SSLv3 

Currently PHP 5.3.13 does not define these constants, and the documentation only gives the values for CURL_SSLVERSION_SSLv2 (2) and CURL_SSLVERSION_SSLv3 (3).  

It would be nice if all these constants were defined in PHP, or at least defined in the documentation.

Test script:
---------------
<?php
        if ( !defined( CURL_SSLVERSION_SSLv3) ) {
                echo "CURL_SSLVERSION_SSLv3 not defined\n";
        }
?>



Expected result:
----------------
no output

Actual result:
--------------
CURL_SSLVERSION_SSLv3 not defined