Problems with wtmp file and logouts

[Tim Underwood]

Using RealVNC Xvnc 3.3.7 and also the 4.x beta, I've noticed that the
wtmp file is not being updated when a session terminates - even
normally.  I've got an accumulation of 30 "logins" showing up using who,
and these logins are consuming more and more pseudo-ttys.

However, there are no active tasks for the majority of these "old"
logins - so it appears to be strictly isolated with the wtmp file not
being updated when someone logs out.

In xinetd, I'm calling Xvnc as follows:

(filename is /etc/xinetd.d/vnc800):

# default: on
# description: The telnet server serves telnet sessions; it uses \
#	unencrypted username/password pairs for authentication.
service vnc800
{
	flags		= REUSE
	socket_type	= stream
	wait		= no
	user		= root
	server		= /usr/bin/Xvnc
    server_args = -inetd -once -query localhost -geometry 800x600 -depth
16
	log_on_failure	+= USERID
	disable		= no
}