in code defining reference-counted objects.

Dehyphenate "data-transfer".

functions.

output buffering defintions and the like)

ISA 3c509 is currently non-functional, although the EISA (3c509-eisa) and
MCA (3c529) variants should build OK.

None of this code is yet tested.

up in the same colour as debug messages for the application stream.

Make expand_buffer() a non-inline function, so that we can add debug
messages.

Expandable buffers now don't *always* round up to the next power of two.
This allows e.g. loading a 137MB ISO image on a machine with only 256MB
RAM...

optimise these down to the correct single "roll"/"rorl" instruction.

value.

to avoid drops even on slow NICs.

is now gPXE-specific.  (The standard malloc() et al have been in stdlib.h
for a while).

Add free memory counter.

anyone?

other protocol won't work at the moment.

protocols by URI scheme.

Tidy up code

reflect the fact that they allocate and deallocate user memory (i.e.
things reached through a userptr_t).

of blocking on asynchronous operations, when that isn't an important
aspect of the code.