clarify USERPWD somewhat more

.TP

.B CURLOPT_USERPWD

Pass a char * as parameter, which should be [user name]:[password] to use for

the connection. If the password is left out, you will be prompted for it.

\fICURLOPT_PASSWDFUNCTION\fP can be used to set your own prompt function.

the connection. If both the colon and password is left out, you will be

prompted for it while using a colon with no password will make libcurl use an

empty password. \fICURLOPT_PASSWDFUNCTION\fP can be used to set your own

prompt function.

When using HTTP and CURLOPT_FOLLOWLOCATION, libcurl might perform several

requests to possibly different hosts. libcurl will only send this user and

password information to hosts using the initial host name, so if libcurl

follows locations to other hosts it will not send the user and password to

those. This is enforced to prevent accidental information leakage.

.TP

.B CURLOPT_PROXYUSERPWD

Pass a char * as parameter, which should be [user name]:[password] to use for