This include file has been inadvertently omitted from previous
checkins.

Add zopen(), zfopen(), and zloadfile() to transparently open and
uncompress a gzip file (adding support for other formats is quite
trivial.

Once a file handle or file pointer is received, it can be treated like
any other one (fstat will report it as a socket, since the length is
unknown.)

Handle unspecified file length for comboot/com32 modules; do changes
to the appropriate part of libcom32 to handle this properly.

Move the prototypes for syslinux_shuffle_boot_[pr]m() from
<syslinux/movebits.h> to <syslinux/boot[pr]m.h>, which anyway has the
required structure definitions.  #include <syslinux/movebits.h> in
those files instead of relying on forward structure definitions.

Conflicts:

	extlinux/extlinux.c

Initial support for the auxillary data vector, a storage mechanism
intended to support boot-once and similar features.

The $PnP probe has been found to lock up at least one machine for
reasons unknown.  Drop it; instead, burn the extra few bytes in the
bootsector to save away ES:DI for later restore.