Mk/**ruby.mk: Switch from USE_RUBY=yes to USES=ruby

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

www/rubygem-html2haml: Update to 2.3.0

Changes:	https://github.com/haml/html2haml/blob/master/Changelog.markdown

www/rubygem-html2haml: Change RUN_DEPENDS from rubygem-haml to rubygem-haml5

- Bump PORTREVISION for dependency change

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.

www: remove 'Created by' lines

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

  *
  *  <hvo.pm@xs4all.nl>
  *  Aaron Dalton <aaron@FreeBSD.org>
  *  Aaron Dalton <aaron@daltons.ca>
  *  Aaron LI <aly@aaronly.me>
  *  Aaron Zauner <az_mail@gmx.at>
  *  Abel Chow <achow@transoft.net>
  *  Adam Weinberger <adamw@FreeBSD.org>
  *  Ade Lovett <ade@FreeBSD.org>
  *  Adrian Steinmann <ast@marabu.ch>
  *  Akinori MUSHA aka knu <knu@idaemons.org>

www/rubygem-html2haml: Update version requirement of RUN_DEPENDS

Remove # $FreeBSD$ from Makefiles.

- Update WWW
- Pet portlint

Approved by:	portmgr blanket

Update to 2.2.0

Changes:	https://github.com/haml/html2haml/blob/master/Changelog.markdown

Change RUN_DEPENDS from rubygem-haml4 to rubygem-haml

- Bump PORTREVISION for dependency and package change

Reference:	https://github.com/haml/html2haml/commit/0339f5eb6d8d5e3d7ad2b871f7a784dbc494c03e

Change RUN_DEPENDS from rubygem-haml to rubygem-haml4

- Bump PORTREVISION for dependency change

Update to 2.1.0

- Pass maintainership to ruby@

Changes:	https://github.com/haml/html2haml/blob/master/Changelog.markdown

Reset ports maintained by horia@racoviceanu.com.

The last change submitted or approved by Horia in Bugzilla dates back to
September 2015. Since then, all commits to his ports were landed by others
after the maintainer timeout period expired (see r383744, r405055, r405057,
r400461 and r414655, for example).

Horia did show interest in coming back after I sent a private email a few
months ago, but since nothing has changed it is better to reassign his ports
back to the heap.

Differential Revision:	https://reviews.freebsd.org/D5980

Convert USES=gem:autoplist to USES=gem since autoplist is default

create USES=gem and update rubygem- ports to use it

Note that for now ports still have to have USE_RUBY=yes to use USES=gem

PR:		209041
Differential Revision:	https://reviews.freebsd.org/D6070

Remove ${PORTSDIR}/ from dependencies, categories v, w, x, y, and z.

With hat:	portmgr
Sponsored by:	Absolight

- Add LICENSE_FILE

Approved by:	portmgr (blanket)

- Update to 2.0.0
- Add NO_ARCH

PR:		200387
Submitted by:	horia@racoviceanu.com (maintainer)

Transforms an HTML file into corresponding Haml code.

WWW: http://haml.info/

PR:		ports/185062
Submitted by:	Horia Racoviceanu <horia@racoviceanu.com>