[syslinux] pxechn.c32 does not do TFTP

[Gene Cumm]

Digging more, loadfile("192.0.2.1::pxe.0", &file.data, &file.size),
queries DNS, which sounds like it doesn't follow the same call path as
a COM32 calling pxe_dns().  If the DNS won't resolve the IP, things
won't load properly.  pxechn.c32 sets sname in the intended packet to
"192.0.2.1" which may be confusing something.

More debugging needed.

--
-Gene