japanese/ja-tex-xdvik: Remove this variant in favor of tex-xdvik

Mk/**tex.mk: Convert bsd.tex.mk to USES=tex

- Update all the consumers to use USES=tex
- USE_TEX=yes is the old way of writing USES=tex which has been removed
  and replaced in all ports
- Almost all of the USE_TEX features remains unchanged
- Some consumers had the same variables defined both in the mk
  infrastructure and also in the ports which have been removed from the
  ports as those are redundant.

In case any of the consumers are failing to build please make sure that
the nexessary USES=tex is there. Unlike previous USE_TEX=yes will no
longer load the required VARS for tex and related dependencies.

Reviewed by:	portmgr
Approved by:	portmgr (blanket)

Remove WWW entries moved into port Makefiles

Commit b7f05445c00f has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.

This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.

Approved by:		portmgr (tcberner)

Add WWW entries to port Makefiles

It has been common practice to have one or more URLs at the end of the
ports' pkg-descr files, one per line and prefixed with "WWW:". These
URLs should point at a project website or other relevant resources.

Access to these URLs required processing of the pkg-descr files, and
they have often become stale over time. If more than one such URL was
present in a pkg-descr file, only the first one was tarnsfered into
the port INDEX, but for many ports only the last line did contain the
port specific URL to further information.

There have been several proposals to make a project URL available as
a macro in the ports' Makefiles, over time.

japanese: remove 'Created by' lines

A big Thank You to the original contributors of these ports:

  *  ABURAYER Rewsirow <pcs51674@asciinet.or.jp>
  *  Aaron Dalton <aaron@FreeBSD.org>
  *  Akinori MUSHA aka knu <knu@idaemons.org>
  *  Akito FUJITA <fujita@zoo.ncl.omron.co.jp>
  *  Andrew Pantyukhin <infofarmer@FreeBSD.org>
  *  Daichi GOTO <daichi@FreeBSD.org>
  *  Daisuke Kawahara <kawahara@pine.kuee.kyoto-u.ac.jp>
  *  David O'Brien (obrien@cs.ucdavis.edu)
  *  Eiji-usagi-MATSUmoto <usagi@ruby.club.or.jp>
  *  FUJISHIMA Satsuki <sf@FreeBSD.org>
  *  Fumihiko Kimura <jfkimura@yahoo.co.jp>

japanese/ja-tex-xdvik: New port

This port is copied from print/tex-xdvik. The port consists of some
extra patches from Japanese SourceForge page and the exact purpose is
not well understood by me. The patch is also from the early 2008 and
currently not compatible with the latest version. But if someone can
make this work with the latest version(will commit soon) patches are
welcome.

From my understanding hrs@ might be the best possible person to
understand this hence assigning MAINTAINERSHIP to hrs@.