Description:
------------
PHP's curl_setopt is missing many options available in 
libcurl.

Reproduce code:
---------------
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_FTP_USE_EPSV, false);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_FAILONERROR, true);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
curl_setopt($ch, 138 /* CURLOPT_FTP_FILEMETHOD */, 3 /* CURLFTPMETHOD_SINGLECWD */); // not supported yet; integers don't work
$localFH = fopen($localCopyPath, 'w+');
curl_setopt($ch, CURLOPT_FILE, $localFH);
$ok = curl_exec($ch);
curl_close($ch);


Expected result:
----------------
I would expect that the curl extension would keep more up-
to-date with the curl options.

man curl_easy_setopt

will show all available curl options.

Alternatively, it'd be nice if there were a curl_easy_setopt
() function in php so that one could use options even if 
they were not "supported" in php. At present, even passing 
the correct integer values to curl_setopt() will not do 
anything since the php curl extension only accepts defined 
options.

In particular, I need the following options:

option: CURLOPT_FTP_FILEMETHOD
values: CURLFTPMETHOD_MULTICWD, CURLFTPMETHOD_NOCWD, 
CURLFTPMETHOD_SINGLECWD