Use the core function jiffies() to implement times(), instead of
poking at the BIOS variable.

This creates a new need for a include file namespace for items
exported from the core for the purpose of the library (not intended
for direct use by applications).  Use the <core/*.h> namespace for
that.

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

Resolved Conflicts:
	MCONFIG.embedded
	com32/MCONFIG
	com32/lib/Makefile
	core/Makefile
	core/extern.inc
	core/extlinux.asm
	core/isolinux.asm
	core/syslinux.ld

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

With the emacs config given by hpa, which is really powfull, I restyled the
unsytled code.

Signed-off-by: Liu Aleaxander <Aleaxander@gmail.com>

We fist make it simple, as told by hpa. Here're the changes:
1, The DIR structure changed, just a file pointer included.
2. So, the open/close/read-dir stuff in com32/lib/ changed again.
3. We read one stuff from every readdir call.

Signed-off-by: Liu Aleaxander <Aleaxander@gmail.com>

Here're some big changes:
1. The vfs-dir stuff added.
2. The dir-functions in com32/lib are mostly rewritten.
3. with little change on rosh for avoid the compile error

Well, I don't think it's a good vfs-dir interface.

Signed-off-by: Liu Aleaxander <Aleaxander@gmail.com>

Conflicts:
	com32/lib/Makefile

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

Conflicts:
	com32/elflink/Makefile

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