SplFileObject::fread() not new in 5.6

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@334794 c90b9560-bf6c-de11-be94-00142212c4b1
fleshed out SplFileObject::fread() a bit

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@334795 c90b9560-bf6c-de11-be94-00142212c4b1