[syslinux] patch for UEFI PXE booting bugs

[Patrick Masotta]

>>> 
 Regarding UseDefaultAddress
 (as mentioned recently), some implementations don't route automatically
 unless it's used.
 <<<<


Sorry I cannot find the recent comment on this;
It is my believe we "should" use  "UseDefaultAddress"
and not mess with the default IP that it supposed to be the one 
received by DHCP when using "UseDefaultAddress" right?

Best,
Patrick