Relicense files for which I am the sole author (as identified by
util/relicense.pl).

Signed-off-by: Michael Brown <mcb30@ipxe.org>

Add FILE_LICENCE declarations to almost all files that make up the
various standard builds of gPXE.

doesn't want to go to the hassle of processing a full memory map.

and creating a memory map that's easier to work with than the E820 map.