Fix inetd mode, everything seems to work now :)

Don't print to stderr/stdout when running in inetd mode, it upsets the
clients.  Moved initilizaion from top to bottom of main(), makes no
difference to either use case.

Also, there's some problem with the PORT command.  Only seems to
manifest itself on the old Netkit FTP client though ... however, fixed
small problem with uftpd reporting OK on bad PORT commands.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>