Switch from Mk/bsd.ruby.mk to Mk/Uses/ruby.mk

Notable changes are.

- Mk/bsd.ruby.mk is moved to Mk/Uses/ruby.mk.
- USE_RUBY=yes is replaced with USES=ruby.
- USE_RUBY_EXTCONF is replaced with USES=ruby:extconf.
- USE_RUBY_RDOC is replaced with USES=ruby:rdoc.
- USE_RUBY_SETUP is replaces with USES=ruby:setup.
- RUBY_NO_BUILD_DEPENDS and RUBY_NO_RUN_DEPENDS are replaced with
  USES=ruby:{build,none,run}.
- RUBY_REQUIRE isn't used anywhere, so removed.
- USES=gem now implies USES=ruby.

This is mainly the work of yasu@ at https://reviews.freebsd.org/D27863

I have just made some cosmetic changes and ran exp-run to test that the
tree is not in a BROKEN state.

Approved by:	portmgr
Differential Revision:	https://reviews.freebsd.org/D37925

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.

This commit implements such a proposal and moves one of the WWW: entries
of each pkg-descr file into the respective port's Makefile. A heuristic
attempts to identify the most relevant URL in case there is more than
one WWW: entry in some pkg-descr file. URLs that are not moved into the
Makefile are prefixed with "See also:" instead of "WWW:" in the pkg-descr
files in order to preserve them.

There are 1256 ports that had no WWW: entries in pkg-descr files. These
ports will not be touched in this commit.

The portlint port has been adjusted to expect a WWW entry in each port
Makefile, and to flag any remaining "WWW:" lines in pkg-descr files as
deprecated.

Approved by:		portmgr (tcberner)

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

  *  <ports@c0decafe.net>
  *  Adam Weinberger <adamw@FreeBSD.org>
  *  Alberto Villa <avilla@FreeBSD.org>
  *  Alexander Logvinov <ports@logvinov.com>
  *  Alexander Timoshenko <gonzo@univ.kiev.ua>
  *  Andrew Lewis <freeghb@gmail.com>
  *  Andrey Akhmichin <sepulkarium45@yahoo.com>
  *  Bartek Rutkowski <r@robakdesign.com>
  *  Bernard Spil <brnrd@freebsd.org>
  *  Brendan Molloy <brendan+freebsd@bbqsrc.net>
  *  Denis Shaposhnikov <dsh@vlink.ru>
  *  Dennis Herrmann <dhn@FreeBSD.org>
  *  Dmitry Sivachenko <demon@FreeBSD.org>
  *  Emanuel Haupt <ehaupt@FreeBSD.org>
  *  Eugene Grosbein <eugen@FreeBSD.org>
  *  Florent Thoumie <flz@FreeBSD.org>
  *  Frank Altpeter <frank@altpeter.de>
  *  Gea-Suan Lin <gslin@gslin.org>
  *  Geoffrey Mainland <mainland@apeiron.net>
  *  Henry Hu <henry.hu.sh@gmail.com>
  *  Jim Mock <jim@FreeBSD.org>
  *  Joe Marcus Clarke <marcus@FreeBSD.org>
  *  John Prather
  *  Jonathan Chen <jonc@chen.org.nz>
  *  Joseph S. Atkinson <jsatkinson@embarqmail.com>
  *  Junji NAKANISHI <jun-g@daemonfreaks.com>
  *  Kelly Cochran <kcochran@trolans.net>
  *  Koop Mast <kwm@FreeBSD.org>
  *  Kris Moore <kmoore@FreeBSD.org>
  *  Kris Moore <kmoore@freebsd.org>
  *  Lars Eggert <lars.eggert@gmx.net>
  *  Marc Bruenink
  *  Matthew West <mwest@uct.ac.za>
  *  Matthias Fechner <mfechner@FreeBSD.org>
  *  Max E. Kuznecov <mek@mek.uz.ua>
  *  Meethune Bhowmick <meethune@gmail.com>
  *  Michael Johnson <ahze@FreeBSD.org>
  *  Nicola Stanislao Vitale <nivit@FreeBSD.org>
  *  Nicola Vitale <nivit@email.it>
  *  Nikolay Pavlov <qpadla@gmail.com>
  *  Oleg Ginzburg (olevole@olevole.ru)
  *  Pavel Andreev
  *  Saulius Menkevicius <bob@nulis.lt>
  *  SeaD
  *  Seamus Venasse <svenasse@polaris.ca>
  *  Sergey Skvortsov <skv@protey.ru>
  *  Steve Wills <swills@FreeBSD.org>
  *  Sunpoet Po-Chuan Hsieh <sunpoet@FreeBSD.org>
  *  TAKATSU Tomonari <tota@FreeBSD.org>
  *  Thierry Thomas <thierry@pompo.net>
  *  Tsung-Han Yeh <snowfly@yuntech.edu.tw>
  *  Vsevolod Stakhov <vsevolod@highsecure.ru>
  *  Wen Heping <wen@FreeBSD.org>
  *  Yen-Ming Lee <leeym@cae.ce.ntu.edu.tw>
  *  Yuri <yuri@tsoft.com>
  *  Yuri Victorovich
  *  Yuri Victorovich <yuri@rawbw.com>
  *  dd
  *  gahr
  *  gnome@freebsd.org
  *  jodocus <jodocus@jodocus.org>
  *  mph
  *  trasz
  *  vsevolod

With hat:	portmgr

- Bump PORTREVISION for dependency change

Changes:	https://github.com/termtter/termtter/blob/master/ChangeLog
		https://github.com/termtter/termtter/commits/master

Changes:	https://github.com/termtter/termtter/blob/master/ChangeLog
		https://github.com/termtter/termtter/commits/master

- Update existing gemspec patch for rubygem-builder and rubygem-fluent-logger
- Bump PORTREVISION for package change