Allow a configuration to specify an arbitrary address where the
compressed kernel image is located, in the event it can't be appended
to or embedded within the gzboot binary itself.

Drop bootprog_maker (formerly enabled by -M) and bootprog_date (formerly
disabled by -D) from the output of newvers_stand.sh. Change -D to the
inverted logic, so that it adds the date to bootprog_re

Drop bootprog_maker (formerly enabled by -M) and bootprog_date (formerly
disabled by -D) from the output of newvers_stand.sh. Change -D to the
inverted logic, so that it adds the date to bootprog_rev in ().

Change all platforms accordingly. -D is added if MKREPRO is not yes and
wasn't present before. Platforms that didn't use -D don't depend on
MKREPRO now either.

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kill extra whitespaces
reviewed by tsutsui@

bcopy -> memcpy

bzero -> memset

free -> dealloc
unsigned -> size_t for alloc/dealloc

The new zlib uses HEAP_SIZE, so instead use BOARD_HEAP_SIZE as the
symbol to use here. Also adapt to the new zlib with the changed name
for the header file.

merge ktrace-lwp.

remove license clauses 3 and 4 from my cpoyright notices

Allow MAXIMAGESIZE to be set to 0. For gzboot's that are linked
for flash, this allows us to basically do:

cat gzboot.bin netbsd.bin.gz > gzimg

to produce the bootable image.

* Call board_init() rather than mem_init() (board_init() will take
care of that for us).
* Call board_fini() right before jumping to the kernel entry point.

Improve zlib error reporting.

Use bcopy() and bzero(), since the rest of libsa does. This means
we don't have to pull in memset() and memcpy() from libsa.

Don't need to provide zcalloc() and zcfree(); there are such routines
in libz.

Fix a silly bug in the propellor spinning code.

gzboot -- boot a gzip'd kernel image. This is useful for booting
compressed kernel images from flash.

This needs more work, but is a good first-pass.