command can create anonymous FTP user, set up its home directory, install
neccessary binaries in it, set or correct all the permissions in it, and
make a directory for user uploads under it.
command can remove the anonymous FTP user, along with its home directory.
use this group for the anonymous FTP account.
Check whether the binaries and libraries of the ftp hierarchy should be
updated or not (an exit status of 0 means no update required).
Update binaries and libraries of the anonymous ftp hierarchy.
Display some help and exit.
Output version information and exit.
command ignores any command line options or parameters.