Use ${TOOL_GZIP} instead of just gzip in all Makefiles
outside */dist/* subdirectories.

When USE_PIGZGZIP=yes, bsd.own.mk sets TOOL_GZIP=${TOOL_PIGZ},
so there's no need to test USE_PIGZGZIP in these Makefiles.

branches: 1.16.22; 1.16.28;
Convert all the etc/etc.*/Makefile.inc to use RELEASEDIR/RELEASEMACHINEDIR
just like etc/Makefile does.

branches: 1.15.4; 1.15.10; 1.15.12; 1.15.14;
Add a comment reminding to update the release notes if the list of
kernels change.

As requested in PR port-cats/30460 add support for GENERIC.ABLE kernel to
sysinst, and also add the ABLE install kernel to the generated release
kernels.

Correct gunzip behaviour, feed the output into stdout, so the redirect works.

- rename 'iso-image_*' -> 'iso-image-*'
- run MAKESUMS in iso-image, *after* the MD iso-image-md-post has run,
since the latter might actually modify the generated image...

- Enable OBJ support for etc/; a scratch dir is needed for iso-image.
- Add ${.CURDIR} to various rules.
- Remove the ${KERNOBJDIR} (sys/arch/${MACHINE}/compile) objdir creation
from here.
- Rework iso-image to copy temporary files (such as kernels or boot files)
into a temporary directory instead of stomping over ${RELEASEDIR}, and
use mkisofs -graft-points to merge the temporary directory and
${RELEASEDIR}/${MACHINE}.
NOTE: mkisofs 2.0 is highly recommended for functioning -graft-points
- Add some more comments

Install release files under "${RELEASEDIR}/${MACHINE}/..." instead of
"${RELEASEDIR}/...".

${RELEASEDIR} is never cleaned , and ${RELEASEDIR}/${MACHINE} is only
cleaned if UPDATE is not defined.

- add snap_post, which makes "clean depend all release" in ../distrib/
for all platforms.
- remove now unnecessary replicated code in the various snap_md_post targets
- remove snap_md_pre; nothing uses it any more
- use ${NETBSDSRCDIR} and ${KERNSRCDIR} as appropriate

No need for an installation/misc directory.

Add hooks for iso image creation.

branches: 1.7.2;
- consistency cleanup
- ensure INSTALLATION_DIRS contains the appropriate extra directories
for a given platform

Add "aout" to KERNEL_SUFFIXES.

The results of my cats NWDO hacking.

This was tested using a custom INSTALL kernel. The current one is >4Mb
which the cats firmware can't currently boot. We need to decide what
needs to be removed from INSTALL.

Descend into distrib so as to ensure the INSTALL notes get built.

Add a MAKESUMS variable which invokes makesums with CKSUM in its environment.
Use this whenever we want to invoke makesums.

Correct "makesums" calls to use the correct directory name for installation
kernels. This should fix PR port-arm/14145.

Add initial etc.cats support so that make snapshot/release will work.

Mostly copied across from etc.arm32 with some obvious things removed, e.g.
RiscPC/Shark devices, the disktab cut down and a mfs entry added in fstab.