Automatically reformat com32/lib/syslinux/loadfile.c using Nindent.

Do this for all files except HDT, gPXE and externally maintained
libraries (zlib, tinyjpeg, libpng).

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

Make sure we don't trash a useful value in errno.

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.

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