.SH DESCRIPTION
Pass a long. If the parameter equals 1, it tells the library to perform all
the required proxy authentication and connection setup, but no data transfer,
-and then return.
+and then return. This option is implemented for HTTP, SMTP and POP3.
The option can be used to simply test a connection to a server, but is more
useful when used with the \fICURLINFO_LASTSOCKET\fP option to
.SH DEFAULT
0
.SH PROTOCOLS
-HTTP, SMTP, POP3 and IMAP
+HTTP, SMTP and POP3
.SH EXAMPLE
TODO
.SH AVAILABILITY