A bunch of glibc header files were bogusly included.  We should not
depend on having a 32-bit glibc installed, since we don't use it.

Compiling as root is highly discouraged, but some people do it anyway.
gcc_ok, however, can clobber /dev/null due to "-o /dev/null"; this is
bad.  Instead, write a temporary file and delete it.

Move <syslinux.h> to <syslinux/idle.h> since that was all that was there;
do_idle() in libutil can simply be a macro for syslinux_idle() or
sched_yield() as appropriate.

Library support for constructing initramfs.  This version is *not*
complete, as it doesn't take into account alignment requirements
properly.

- Move the loadfile() routine into <syslinux/loadfile.h>.
- Actually use the loadfile() routine.

Initial checkin of a wrapper infrastructure for the "shuffle and boot"
interface, both real and protected mode.  This code automatically will
figure out the necessary sequence of moves, taking into account swaps
and overlaps as necessary.