Up: NASL library
cleanly closes a FTP connection: sends ``QUIT'', waits for the
answer and then closes the socket. This functions does not return
returns the FTP banner that was stored in the KB under ``ftp/banner/port_number''.
If the KB item is not present, the function connects to the FTP server,
reads the banner, stores it into the KB and returns it.
reads a line on the socket until the 4
different from ``-''. Useful to skip a long login banner.