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.

devel: remove 'Created by' lines

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

  *  "Waitman Gobble" <uzimac@da3m0n8t3r.com>
  *  <jkoshy@FreeBSD.org>
  *  Aaron Dalton <aaron@FreeBSD.org>
  *  Aaron Dalton <aaron@daltons.ca>
  *  Aaron H. K. Diep <ahkdiep@gmail.com>
  *  Aaron Hurt <ahurt@anbcs.com>
  *  Abel Chow <abel_chow@yahoo.com>
  *  Adam McLaurin
  *  Adam Saponara <as@php.net>
  *  Adam Weinberger <adamw@FreeBSD.org>
  *  Ade Lovett <ade@FreeBSD.org>

Remove # $FreeBSD$ from Makefiles.

Update to 1.2.7

Changes:	https://github.com/eventmachine/eventmachine/releases

Update to 1.2.6

Changes:	https://github.com/eventmachine/eventmachine/releases

Fix build with clang 6

em.cpp:1242:59: error: invalid operands to binary expression ('__bind<int &,
sockaddr *, unsigned long &>' and 'int')
                if (bind (sd, (struct sockaddr *)&bind_to, bind_to_len) < 0) {
                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~

PR:		225304
Reported by:	pkg-fallout

Fix LICENSE_FILE

Update to 1.2.5

- Sort LICENSE_FILE

Changes:	https://github.com/eventmachine/eventmachine/blob/master/CHANGELOG.md

Update to 1.2.3

Changes:	https://github.com/eventmachine/eventmachine/blob/master/CHANGELOG.md

Update to 1.2.2

- Add USES=ssl

Changes:	https://github.com/eventmachine/eventmachine/blob/master/CHANGELOG.md

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 1.2.0.1
- Add LICENSE_FILE

Changes:	https://github.com/eventmachine/eventmachine/blob/master/CHANGELOG.md

- Update to 1.0.9.1

Changes:	https://github.com/eventmachine/eventmachine/blob/master/CHANGELOG.md

- Update to 1.0.9

Changes:	https://github.com/eventmachine/eventmachine/blob/master/CHANGELOG.md

- Update to 1.0.8

Changes:	https://github.com/eventmachine/eventmachine/blob/master/CHANGELOG.md

- Update to 1.0.7

Changes:	https://github.com/eventmachine/eventmachine/blob/master/CHANGELOG.md

- Remove leading indefinite article from COMMENT
- Add LICENSE

- Add stage support

Add NO_STAGE all over the place in preparation for the staging support (cat:
devel part 4)

- Update to 1.0.3

- Update to 1.0.0

- Removing remaining MD5 from rubygem- ports

- Re-assign all my ruby* ports to ruby@

Discussed with: pgollucci, stas

- Mass fixup of WWW: lines pkg-descr based on rubygems.org Homepage meta info

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

- Mass conversion of RF -> RG for MASTER_SITE for rubygem- ports
  [RG aka rubygems.org]

PR:             ports/147005
Submitted by:   pgollucci (myself)
Approved by:    portmgr (pav)
With Hat:       ruby@

- Update to 0.12.10

- Update to 0.12.8

PR:             ports/135352
Submitted by:   pgollucci
Approved by:    glarkin (mentor)

Change MAINTAINER on my ports to my FreeBSD email address

Approved by:    tabthorpe (mentor)

- Update to 0.12.6

PR:             132649
Submitted by:   Alexander Logvinov <ports@logvinov.com> (maintainer)

- Update to  0.12.4

PR:             131764
Submitted by:   Alexander Logvinov <ports@logvinov.com> (maintainer)

- Update to 0.12.2

PR:             ports/127736
Submitted by:   maintainer (Alexander Logvinov)

Update to 0.12.0

PR:             ports/124381
Submitted by:   Alexander Logvinov <ports@logvinov.com> (maintainer)

- Add ruby 1.9 support
- Implement new knobs for gems and rake (these are included in
  ruby 1.9 distribution already). Also move gem bits from
  ruby-gems/Makefile.common to bsd.ruby.mk[1]. Now to depend
  on gems or rake you should define USE_RUBYGEMS/USE_RAKE
  accordingly. Also RAKE_BIN variable is provided for
  pointing to the right rake executable.
- Rewrite RUBY_SCHEBANG in awk to eliminate build dependency
  on ruby.

Discussed with: Jonathan Weiss <jw@innerewut.de> [1] (gems maintainer)
Tested by:      ports@

- Update to 0.10.0

PR:             118574
Submitted by:   Alexander Logvinov <ports@logvinov.com> (maintainer)

- Update to 0.9.0

PR:             116426
Submitted by:   Alexander Logvinov <ports@logvinov.com>

- Update to 0.8.0

PR:             114609
Submitted by:   Alexander Logvinov <ports@logvinov.com> (maintainer)

- Update to 0.7.2

PR:             112879
Submitted by:   Alexander Logvinov <ports@logvinov.com> (maintainer)

EventMachine implements a fast, single-threaded engine for arbitrary network
communications. It's extremely easy to use in Ruby. EventMachine wraps all
interactions with IP sockets, allowing programs to concentrate on the
implementation of network protocols. It can be used to create both network
servers and clients. To create a server or client, a Ruby program only needs
to specify the IP address and port, and provide a Module that implements the
communications protocol. Implementations of several standard network protocols
are provided with the package, primarily to serve as examples. The real goal
of EventMachine is to enable programs to easily interface with other programs
using TCP/IP, especially if custom protocols are required.

WWW: http://rubyforge.org/projects/eventmachine

PR:             ports/111095
Submitted by:   Alexander Logvinov <ports at logvinov.com>