device.

Separated the mechanisms of non-volatile storage access and non-volatile
stored options.

for realloc(0) being a valid way to free memory.

with octal yet, but we can probably live without that.

defined in vsprintf.h.  (This may change, since vsprintf.h is a
non-standard name, but for now it's the one to use.)

There should be no need to include vsprintf.h just for DBG() statements,
since include/compiler.h forces it in for a debug build anyway.

dependency on dev.o.

stack or INT 13 emulator etc.

default test to the DHCP test.

Kill off the static single net device and move to proper dynamic
registration (which we need with the new device model).

Break the (flawed) assumption that all network-layer protocols can use
ARP; such network-layer protocols (i.e. IPv4) must now register as an ARP
protocol using ARP_NET_PROTOCOL() and provide a single method for checking
the existence of a local network-layer address.

not-yet-updated drivers to at least function.

point trying to use the old boot sequence.  Replaced with a call to the
AoE demo code, so that people can at least build and try something useful.

This is the core portion of the async I/O interface.

need for a CONFIG_RELOCATE.

- implemented hline/vline (part of wborder family)
- screen cursor now relocates at same time as window cursor when
  restoring after a non-wrapping function

Also trim another eight bytes from vsprintf.o.  :)

- fixes to wborder (same)
- addition of a few minor functions

- implemented color_content, wborder, wblrtobot, wclrtoeol, wcolor_set and several small functions
- added rest of expected global variables