[syslinux] Recursive pxelinux.0 and pxelinux.cfg directories.

[H. Peter Anvin]

Vance Turner wrote:
> How does pxelinux.0 know of its conf directory? Is this hard linked in
> the code? ( Probably ) Can we give it a hint by recalling it?
> 
> What about the usefulness of vesamenu.c32 or menu.c32
> 

The config directory is determined by DHCP option 210 if one is present, 
otherwise by the filename used to fetch pxelinux.0 itself.

Now, there is a catch here -- this is the filename as provided by the 
DHCP stack.  At this point, chainloading a new pxelinux.0 doesn't change 
this; this may be possible to change although it is dependent on the PXE 
stack.

	-hpa