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

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.

textproc: remove 'Created by' lines

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

  *  "Choe, Cheng-Dae" whitekid
  *  -
  *  <glewis@FreeBSD.org>
  *  <koshy@india.hp.com>
  *  Aaron Dalton <aaron@FreeBSD.org>
  *  Aaron Dalton <aaron@daltons.ca>
  *  Aaron Straup Cope
  *  Aaron Straup Cope <ascope@cpan.org>
  *  Ache
  *  Adam Herzog <adam@herzogdesigns.com>
  *  Adam Weinberger <adamw@FreeBSD.org>

textproc/rubygem-kramdown: Update to 2.4.0

Changes:	https://kramdown.gettalong.org/news.html
		https://github.com/gettalong/kramdown/blob/master/doc/news/release_2_4_0.page

textproc/rubygem-kramdown: Update to 2.3.2

Changes:	https://kramdown.gettalong.org/news.html
		https://github.com/gettalong/kramdown/blob/master/doc/news/release_2_3_2.page

textproc/rubygem-kramdown: Cosmetic change

textproc/rubygem-kramdown: Add CPE information

Approved by:	portmgr (blanket)

textproc/rubygem-kramdown: Update to 2.3.1

Changes:	https://kramdown.gettalong.org/news.html
		https://github.com/gettalong/kramdown/blob/master/doc/news/release_2_3_1.page

Remove # $FreeBSD$ from Makefiles.

Update to 2.3.0

Changes:	https://kramdown.gettalong.org/news.html
		https://github.com/gettalong/kramdown/blob/master/doc/news/release_2_3_0.page
Security:	20b46222-c12b-11ea-abe8-08002728f74c
MFH:		2020Q3

Update to 2.2.1

Changes:	https://kramdown.gettalong.org/news.html
		https://github.com/gettalong/kramdown/blob/master/doc/news/release_2_2_1.page

Update to 2.2.0

Changes:	https://kramdown.gettalong.org/news.html
		https://github.com/gettalong/kramdown/blob/master/doc/news/release_2_2_0.page

Update to 2.1.0

- Take maintainership

Changes:	https://kramdown.gettalong.org/news.html
		https://github.com/gettalong/kramdown/blob/master/doc/news/release_2_0_0.page
		https://github.com/gettalong/kramdown/blob/master/doc/news/release_2_1_0.page

Update to 1.17.0

Changes:	https://kramdown.gettalong.org/news.html

Update to 1.16.2

Changes:	https://kramdown.gettalong.org/news.html

Update to 1.15.0

Changes:	https://kramdown.gettalong.org/news.html

Update to 1.14.0

Changes:	https://kramdown.gettalong.org/news.html

Update to 1.13.2

- Update WWW

Changes:	https://kramdown.gettalong.org/news.html

textproc/rubygem-kramdown: update to 1.13.1

- Update to 1.11.1

Changes:	http://kramdown.gettalong.org/news.html

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

- Update to 1.10.0

Changes:	http://kramdown.gettalong.org/news.html

- Update to 1.9.0
- Add LICENSE_FILE
- Simplify SHEBANG_FILES

Changes:	http://kramdown.gettalong.org/news.html
		https://github.com/gettalong/kramdown/commits/master

- Fix shebangs

Approved by:	portmgr blanket
MFH:		2015Q3 (blanket)

- Update to 1.8.0
- Remove blank line between NO_ARCH and USE_RUBY

Changes:	http://kramdown.gettalong.org/news.html
		https://github.com/gettalong/kramdown/commits/master

Set NO_ARCH for remaining rubygem-* ports with no arch dependent files

Obtained from:  DEVELOPER_MODE
With Hat:       ruby@

Sponsored by:   RideCharge Inc / Curb

- Update to 1.7.0

Changes:	https://github.com/gettalong/kramdown/commits/master

textproc/rubygem-kramdown: update to 1.4.2

textproc/rubygem-kramdown: update to 1.4.1

- Update to 1.3.3

PR:		ports/187999
Submitted by:	Michael Moll <kvedulv@kvedulv.de>

- Update to 1.3.1
- Add LICENSE
- Update homepage

PR:		ports/185064
Submitted by:	Horia Racoviceanu <horia@racoviceanu.com>

- Add stage support

Add NO_STAGE all over the place in preparation for the staging support (cat:
textproc)

- Use single space after WWW:

- Update to 1.0.2

- Update to 0.13.7

- Update to 0.13.4

With Hat:       ruby@
Sponsored by:   RideCharge Inc. / TaxiMagic

kramdown is yet-another-markdown-parser but fast, pure Ruby, using a strict
syntax definition and supporting several common extensions.

WWW:    http://kramdown.rubyforge.org/