VAX boot.fs: Fix owner/group/permissions for VAX's boot.fs (Jan-Benedict Glaw)

(Initial patch from Christos Zoulas.) Don't create an archive based on local
permission bits and owner/group. Instead, feed a small manifest into `pax`
and let it to its work.

NB: Don't also feed in an entry for the current directory ".", as `pax` will
then archive all files in the current directory, in `readdir()` order.

more MKREPRO_TIMESTAMP fixes (for pax/tar generated files)

branches: 1.13.44; 1.13.48;
Change remaining instances of ${RELEASEDIR}/${MACHINES} to
${RELEASEDIR}/${RELEASEMACHINEDIR}

branches: 1.12.32; 1.12.36;
Rename a large chunk of the make(1) variables which refer to a
program/tool from "FOO" to "TOOL_FOO". The new variables are:
TOOL_ASN1_COMPILE TOOL_CAP_MKDB TOOL_CAT TOOL_CKSUM TOOL_COMPILE_ET
TOOL_CONFIG TOOL_CRUNCHGEN TOOL_CTAGS TOOL_DB TOOL_EQN TOOL_FGEN
TOOL_GENCAT TOOL_GROFF TOOL_HEXDUMP TOOL_INDXBIB TOOL_INSTALLBOOT
TOOL_INSTALL_INFO TOOL_M4 TOOL_MAKEFS TOOL_MAKEINFO TOOL_MAKEWHATIS
TOOL_MDSETIMAGE TOOL_MENUC TOOL_MKCSMAPPER TOOL_MKESDB
TOOL_MKLOCALE TOOL_MKMAGIC TOOL_MKTEMP TOOL_MSGC TOOL_MTREE
TOOL_PAX TOOL_PIC TOOL_PREPMKBOOTIMAGE TOOL_PWD_MKDB TOOL_REFER
TOOL_ROFF_ASCII TOOL_ROFF_DVI TOOL_ROFF_HTML TOOL_ROFF_PS
TOOL_ROFF_RAW TOOL_RPCGEN TOOL_SOELIM TOOL_SUNLABEL TOOL_TBL
TOOL_UUDECODE TOOL_VGRIND TOOL_ZIC

For each, provide default in <bsd.sys.mk> of the form:
TOOL_FOO?= foo
and for the ${USETOOLS}=="yes" case in <bsd.own.mk>, provide override:
TOOL_FOO= ${TOOLDIR}/bin/${_TOOL_PREFIX}foo

Document all of these in bsd.README.

This cleans up a chunk of potential (and actual) namespace collision
within our build infrastructure, as well as improves consistency in
the share/mk documentation and provision of appropriate defaults for
each of these variables.

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

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

Invoke ${PAX} with '-O' so that various errors don't hang the make
or the command with an interactive question. (This also prevents
weird problems if a directory element of '-f path' is missing and
'make -j N' is being used).

ramdisk-kernel creates install.ram.gz now, not netbsd.INSTALL.gz

yet another distrib overhaul:
- move guts of distrib/Makefile.inc to distrib/common/Makefile.distrib
(fixes problem caused by implicit include of ../Makefile.inc in certain
submake conditions triggered by makefiles not yet in tree)
- removed mkdir of ${RELEASEDIR}/*; rely upon "snap_pre" target of
etc/Makefile to create all the release directories
- renamed RELINSTALL to RELEASE_INSTALL
- renamed FLOPPYINSTDIR to FLOPPY_RELEASEDIR
- renamed MDSETDIR to MDSET_RELEASEDIR
- removed ITARGET
- move release target from top level to appropriate subdirectory
- ensure release target has correct depends
- replace miniroot's IMAGE_MD_POST with common/Makefile.image IMAGEPOSTBUILD
- Makefile.image: add realall: ${IMAGE}

minor consistency tweaks

Replace "obs" with "bs" and "conv=osync" with "conv=sync" in the dd command.
This is necessary because POSIX doesn't specify "conv=osync" and GNU dd
doesn't implement it. I believe that in this case, where only one output
block should ever be generated and the input is a regular file, bs/sync is
equivalent to obs/osync.

Simplify even more.

Simplify a bit. Use installboot.

Convert floppy to use ustarfs

use distrib/common/Makefile.image, allowing for UNPRIVED builds.
(untested)

branches: 1.1.2;
Add a makefile to make boot.fs for vax.