[Bug] No password prompt when the `-p' option is issued.

[Guan Xin]

The later versions of lftp do not prompt for a password when a `-p'
option is issued. i.e.
lftp protocol://[EMAIL PROTECTED] -p port
or
lftp -p port protocol://[EMAIL PROTECTED]
will not prompt for a password. But
lftp protocol://[EMAIL PROTECTED]:port
will.

Earlier versions (at least before 3.4.0) do not have this bug.