curl.1: minor edit of --ftp-ssl*

\fI--ftp-ssl-control\fP and \fI--ssl-reqd\fP for different levels of

encryption required. (Added in 7.20.0)

This option was formerly known as \fI--ftp-ssl\fP (Added in 7.11.0) and that

can still be used but will be removed in a future version.

This option was formerly known as \fI--ftp-ssl\fP (Added in 7.11.0). That

option name can still be used but will be removed in a future version.

.IP "--ssl-reqd"

(FTP, POP3, IMAP, SMTP) Require SSL/TLS for the connection.  Terminates the

connection if the server doesn't support SSL/TLS. (Added in 7.20.0)

This option was formerly known as \fI--ftp-ssl-reqd\fP (added in 7.15.5) and

This option was formerly known as \fI--ftp-ssl-reqd\fP (added in 7.15.5). That

option name can still be used but will be removed in a future version.

.IP "--socks4 <host[:port]>"

Use the specified SOCKS4 proxy. If the port number is not specified, it is

assumed at port 1080. (Added in 7.15.2)