[syslinux] Very slow download with pxelinux > 4.07 on specific hardware

[H. Peter Anvin]

Here is a thought.

Could you try putting "nohalt 1" in the configuration file?  The
download of ldlinux.c32 and the config file will still be slow, of
course, because this doesn't take effect until the config file is read,
but if it speeds up after that I think we might have a plausible
explanation.

	-hpa