Add Japan CBM character codes.

branches: 1.13.18;
1. added iconv support of KZ-1048 encoding
2. move PTCP154 to KAZAKH directory.

1. add iconv support for followint encoding:
Vietnamese
TCVN 8bit Viet Nam National Standard
VISCII 8bit RFC1456
VIQR 7bit RFC1456(libVIQR)
Unicode Escape (GNU libiconv compatibility)
C99, JAVA (libUES)
2. fix iconv_std module:
add special treatment for POSIX Defect Report #288 case.

added Chinese Tradisional Big5 family,
Big5-2003, Big5-ETen, Big5-IBM, Big-5E, Big-5+.

``Big5 is now the alias of Big5-ETen,
if you want Unicode.org's obsolete mappings, use Big5-IBM instead.

added iconv support for georgian-ps, georgian-academy.

add following encoding support to iconv:
* KOI-7(iso-ir-37, iso-5427)
* KOI-8(old KOI8)
* KOI7-switched(iso-2022 variant)
* KOI8-C -- Pablo Saratxaga's X_LOCALE KOI8-C(Caucasus)
* KOI8-CyrillicOld -- Serge Winitzki's KOI8-C(Cyrillic-Old)
** not exported yet **
* KOI8-E(iso-ir-111, ecma-cyrillic)
* KOI8-RU
* KOI8-T

add iconv support for Armenian State Standard encoding:
ARMSCII-7, ARMSCII-8, ARMSCII-8A

added macintosh encodings(single-byte only).

add csmapper:CNS11643-1,2 and esdb:ISO-2022-CN,
integrate esdb:EUC-TW, locale:zh_TW.eucTW.

Rework how MAKEVERBOSE operates:

* Don't bother prefixing commands with a line of ${_MKCMD}\
and instead rely upon "make -s". This is less intrusive on
all the Makefiles than the former. Idea from David Laight.

* Rename the variables use to print messages. The scheme now is:
_MKMSG_FOO Run _MKMSG 'foo'
_MKTARGET_FOO Run _MKMSG_FOO ${.TARGET}
From discussion with Alistair Crooks.

Implement MAKEVERBOSE.
Rework a bunch of make .for loops into sh for loops.

(XXX: This stuff could be implemented in a more efficient manner that
does a lot less of SOMEMAKEVAR!=some shell command , etc etc)

NOxxx= variables must appear before <bsd.own.mk>

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.

Citrus iconv support(5)
add iconv data files. now ready to use iconv stuffs.
TODO:
- manpages.
- enrich mapper/esdb.