fix warnings, printf formats, etc.

Remove the ALLOC_FIRST_FIT and ALLOC_TRACE options. This is a rather simple
allocator, and it does not need to be that complicated.

Fix printf formating in ifdef DEBUG sections.

Add an optional MD calling convention flag for use in libsa when space
optimisation is critical. Use this on i386 to switch to register passing
calling convention for the file system entry points and

Add an optional MD calling convention flag for use in libsa when space
optimisation is critical. Use this on i386 to switch to register passing
calling convention for the file system entry points and most assembler
call backs that have to preserve at least 3 registers.

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Correct recently exposed printf format problem.

unsigned -> unsigned int

style, indent, and ANSI-fy.

free -> dealloc

merge ktrace-lwp.

nuke trailing whitespace

help with casts, and lint hints.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

KNR, removing ugly 'unsigned' variables.
Probably should be size_t, but now matched prototype.
(mainly agreed with christos - he wanted size_t....)

Kill some more register declarations.

don't bother initializing 'freelist' -- it can be bss

The "found" label is not used if ALLOC_FIRST_FIT is defined.

bestsize is unused if ALLOC_FIRST_FIT is defined.

fix printf() format warnings in debug output

Fix syntax error which appeared #ifdef DEBUG ("end[]").
Simplify the heap location stuff.

Allow to define the location of the heap at runtime #if HEAP_VARIABLE.
That helps to test libsa code in user space.

Bring prototypes into scope.

Initialize 'bestf' to make this compile again with -Wall.

Add some debugging code to free(), to catch frees before the
start of the heap and beyond the end of the heap (if a heap limit
is defined).

Add a whole bunch of features, from Matthias Drochner:
best-fit, rather than first-fit, algorithm.
ability to handle free()s with zero size (needed for gzip read
support).
ability to start th

Add a whole bunch of features, from Matthias Drochner:
best-fit, rather than first-fit, algorithm.
ability to handle free()s with zero size (needed for gzip read
support).
ability to start the heap someplace else (defined by HEAP_START).
ability to limit growth of the heap (via HEAP_LIMIT).
debugging sanity checks (ifdef DEBUG).
allocation tracing support, to help debugging (ifdef ALLOC_TRACE).
and from me:
ability to pick a (smaller) first-fit algorithm (via ALLOC_FIRST_FIT).
lots of comments.

If heap limits and all of the debugging features are disabled (the default),
and ALLOC_FIRST_FIT is defined (not the default), compiled with -O on the
alpha the new version is the same (object) size as the old version.

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make sure new allocations are aligned.