[syslinux] addendum to syslinux/ tftp-hpa docs

[James S. Martin]

After a few days of troubleshooting, we finally determined why we were 
having problems.  It seems as though the tftp-hpa daemon requires the 
MTU of the interface it's running on to be >= 1500.  We had the MTU set 
at 1400 (don't ask why) and the PXE client was receiving fragmented 
packets and failing.  As soon as we set it to over 1500, it worked fine.

hpa,

Could you please update your syslinux/pxelinux and/or tftp-hpa docs so 
they reflect this requirement?

Thanks,

James Martin