Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

Update the lua code to work with Syslinux 4.

Resolved Conflicts:
	com32/Makefile

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

Again, .lnx files are test vehicles... erroring out due to warnings
makes no sense.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

.lnx files are strictly a testing vehicle.  It makes absolutely no
sense to enforce the often rather arbitrary rules of _FORTIFY_SOURCE
on those, so override the default _FORTIFY_SOURCE setting.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

New module which detects if the PLoP Boot Loader already has booted a
CDROM or USB drive by checking for the presence of the PLoP INT13h hook.

The following assembly code (NASM) can detect the PLoP INT13h hook:

  mov eax,'PoLP'  ; Reverse of 'PLoP'
  mov ebp,'DKHC'  ; Reverse of 'CHKD'
  int 13h
  cmp eax,' sey'  ; Reverse of 'yes '
  jz plop_INT13h_active

Signed-off-by: Gert Hulselmans <gerth@zytor.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Skip EDD and CHS detection if we know it is a CD-ROM, because some
CD-ROMs possibly report bad information, and/or screw up the stack,
possibly permanently.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

Move the dprintfs to the location that they were intended to use.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>