Shrink ramdisk to make RAMDISK kernel smaller for ARC BIOS restriction.

bump ramdisk size to 3200k for gcc 8. yay!

1. Remove all the special handling of variables (-d -p -P -s -S) that
were dealing with DBG (-d) LDSTATIC/NOPIE (-p), and the rest with
disabling/enabling sanitizers.
2. Use emalloc/estrdup for all the allocators instead of only some cases.
3. Add -V varspec which passes variables on the command line (as DBG
and LDSTATIC used to be passed before) instead of appending them
to the on-the-fly Makefile using -v varspec.
4. Change the distrib and rescue Makefiles to use -V instead of the removed
flags.

The motivation of this is to make variable handling consistent, less magical,
and remove the need for changing crunchgen each time we want to add disabling
an option by default.

(as proposed in tech-toolchain)

branches: 1.26.10; 1.26.12;
Slightly increase the image size

branches: 1.25.2;
+= for MAKEFS_FLAGS

branches: 1.24.2; 1.24.4;
make bigger.

Explicitly build space constrained ramdisk images without unwind tables.

Bump RAMDISK size so that the contents fits again.

branches: 1.21.6; 1.21.12;
Remove terminfo.db as it's now embedded in libterminfo.

Use the rescue terminfo.db in our images instead of termcap.

34 different termcap subsets, plus a couple of ports still using
the full termcap distfile. In an attempt to reduce the madness
switch everyone (except the i386 cd install which does its own
thing) to the same (under 8K) termcap subset:

ansi ansi/pc-term compatible with color
dumb|unknown 80-column dumb tty
hp300h HP Catseye console
iris-ansi-ap IRIS ANSI in application-keypad mode
iris-ansi|iris-ansi-net IRIS emulating 40 line ANSI terminal (almost VT100)
sun|sun1|sun2|sun-il Sun Microsystems Inc. console with working insert-line
vt100|vt100-am DEC VT100 (w/advanced video)
vt220-8 DEC VT220 8 bit terminal
vt220|vt200|vt300 DEC VT220 in vt100 emulation mode
wsvt25 NetBSD wscons in 25 line DEC VT220 mode
wsvt25m NetBSD wscons in 25 line DEC VT220 mode with Meta
x68k|x68k-ite NetBSD/x68k ITE
xterm|vs100 xterm terminal emulator (X Window System)

Trying to provide similar functionality across all ports? It'll never
catch on...

${NETBSDSRCDIR}/distrib/common/protocols => ${DISTRIBDIR}/common/protocols
${NETBSDSRCDIR}/distrib/common/services => ${DISTRIBDIR}/common/services

Use the cutdown distrib/common/services and distrib/common/protocols
rather than the full fat etc versions

branches: 1.16.2; 1.16.6;
Enable sysinst on arc.
Tested on gxemul emulating PICA, but upgrade is untested at all.

Should close PR port-arc/11444.

Use common/termcap.mini.

branches: 1.14.4;
Since /etc/services has gotten rather large, use a minimal one for install
kernels. (mount_nfs is notably the only binary that doesn't gracefully deal
with the lack of an /etc/services file, it appears.)

Bump md_root size to 2.5Mbytes.

Remove "-Wa,-xgot" hack from DBG flag for broken objcopy-crunchide
that has been fixed by simonb.

bump ramdisk image to 2330k

Rework how SMALLPROG was being used and how INET6 support was enabled.
There's two variables added to Makefile.crunch:

SMALLPROG If 1, add SMALLPROG=1 to CRUNCHENV. [default: 1]
This can be used by various Makefiles to
determine if a `small' version of the program
is required.

SMALLPROG_INET6 If 1 and SMALLPROG == 1, add SMALLPROG_INET6=1
to CRUNCHENV. [default: 0]
This can be used by various Makefiles to
determine if the `small' version has INET6
support enabled.

Only enable SMALLPROG_INET6 for programs on the ramdisks that have INET6 in
the appropriate kernel, and cleanup INET6 setting.
(Note: this means that sysinst won't get INET6 support if the kernel
it's running on doesn't have it).

This change saves a fair bit of space on various install images
(including i386 ramdisk-{ps2,small,tiny}) that didn't have INET6 in
the kernel but were unconditionally getting INET6 support in their tools.

it's 2304_k_

bump ramdisk size, 2M isn't enough

branches: 1.7.2;
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}

Fix IMAGESIZE. (typo in rev 1.4?)

replace _SRC_TOP_ with NETBSDSRCDIR, since the latter is the "public" version

The "objcopy" based crunchide method has a problem on MIPS; it turns global
symbols into locals, but relocs are left in place (rather than attempting
to resolve-in-place with "ld -r", even with "-Bsymbolic").

Standard MIPS code will generate CALL16 relocs for function calls, but
the linker forbids such relocs from being used to call local symbols (such
as those turned "local" by objcopy). So, rather than battle the toolchain
uphill, work around it for the moment by forcing 32-bit GOT references with
the assembler option "-xgot".

This will be fixed in a more clean manner in the future.

Set DBG="-Os -mmemcpy" and pass it to crunchgen.

minor NDWO tweak

First cut at ramdisk build infrastructure for arc with NDWO.