clarify that ftp ascii transfers don't do right in current libcurl

.SH PROTOCOL OPTIONS

.IP CURLOPT_TRANSFERTEXT

A non-zero parameter tells the library to use ASCII mode for ftp transfers,

instead of the default binary transfer. For LDAP transfers it gets the data in

plain text instead of HTML and for win32 systems it does not set the stdout to

binary mode. This option can be usable when transferring text data between

systems with different views on certain characters, such as newlines or

similar.

instead of the default binary transfer. For win32 systems it does not set the

stdout to binary mode. This option can be usable when transferring text data

between systems with different views on certain characters, such as newlines

or similar.

\fBNOTE:\fP libcurl does not do a complete ASCII conversion when doing ASCII

transfers over FTP. This is a known limitation/flaw that nobody has

rectified. libcurl simply sets the mode to ascii and performs a standard

transfer.

.IP CURLOPT_CRLF

Convert Unix newlines to CRLF newlines on transfers.

.IP CURLOPT_RANGE