Drop a newline we didn't need after all.

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

There is enough evidence that "safeint" is a decent compromise between
The Right Thing[TM] and dealing with the reality of ultra-broken
DOSen.  Make it the default.

Clean up some of the command-line parsing code and status printing.

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

Skip non-active ranges when looking for a suitable chunk of memory for
decompression.

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

Some blithering idiot thought it was a good idea to introduce
"extended attributes" for INT 15h, AX=E820h, and in doing so, breaking
compatibility with ALL E820 users out there.  F*cking morons.
Implement handling of extended attributes in:

- e820 parsing in the core
- e820 parsing in libcom32
- e820 parsing *and proxying* in memdisk

The latter is the really painful one.

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

Cleanup and centralize the Makefile system even more.
Fix a gcc 4.3 incompatibility in memdisk (definition of strlen).

Centralize more (most) of the version number machinery to version.pl.

Per the Interrupt list, treat INT 13 08 returning with CL=0 as a
failure, meaning single drive only.

If we find ourselves the only floppy drive, install a DPT into INT
1Eh.  This appears to be needed for PC-DOS 7.0 to boot.  This can be
overridden with the "nodpt" option, and forced with the "dpt" option.

Consider all disks < 4 MB to be floppies, and guess their geometry
algorithmically.

Use the aligning memcpy/memset from libcom32.  Switch memdisk to
compiling with -mregparm=3, except for the interfaces to assembly.