Ubuntu Xvnc packages -- libwrap? access to :0?

[Mike Miller]

It has been a while since I installed Xvnc on anything but now I have a 
new Ubuntu box and am excited to make it do cool things.  With Xvnc there 
used to be a patch, back in the 3.3 days at least, that allowed me to 
compile against libwrap.a and use Wietse Venema's "tcp wrappers" for 
access control.  Is that still available?  It would be nice if there were 
a package for Ubuntu that used tcp wrappers but I'm guessing I'll have to 
compile it myself if I can find the patch.  Do any of you know about this?

The other thing I'm interested in is remote access to display :0 through 
Xvnc.  I believe that years ago we could not access :0 and had to use :1 
or :2, or whatever, instead.  I hear that today it is possible to access 
:0, so I'd like to do that on my Ubuntu machine.

If any of you have tips for me on where to look this up, that would be 
fantastic.  Thank you.

Mike