Note removed curl constants in the 5.6 migration guide.

Fixes bug #68147 (No mention of removing CURLOPT_CLOSEPOLICY).


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@335124 c90b9560-bf6c-de11-be94-00142212c4b1
Fix doc bug #68159 (Ambiguous sentence in "Reference Counting Basics").


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@335125 c90b9560-bf6c-de11-be94-00142212c4b1