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

mail: remove 'Created by' lines

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

  *  <ashish@FreeBSD.org>
  *  Aaron Dalton <aaron@FreeBSD.org>
  *  Adam David <adam@FreeBSD.org>
  *  Adam McDougall <mcdouga9@egr.msu.edu>
  *  Adam Weinberger <adamw@FreeBSD.org>
  *  Ade Lovett <ade@FreeBSD.org>
  *  Akinori MUSHA aka knu <knu@idaemons.org>
  *  Alex Deiter <tiamat@komi.mts.ru>
  *  Alex Dupre <ale@FreeBSD.org>
  *  Alex Dupre <sysadmin@alexdupre.com>
  *  Alex Perel <veers@disturbed.net>

mail/rubygem-rmail: Update to 1.1.4

Changes:	https://github.com/terceiro/rmail/blob/master/ChangeLog

Remove # $FreeBSD$ from Makefiles.

Update to 1.1.3

Changes:	https://github.com/terceiro/rmail/blob/master/ChangeLog

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 1.1.2

Changes:	https://github.com/terceiro/rmail/blob/master/ChangeLog

- Update to 1.1.1

Changes:	https://github.com/terceiro/rmail/blob/master/ChangeLog

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 1.1.0
- Add LICENSE
- Add WWW

Changes:	https://github.com/terceiro/rmail/blob/master/ChangeLog

- Add stage support

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

- Reset maintainer after no response to mail since Jan 2013
- Clean up headers and comments while here

Reviewed by:	danfe

- Add missing WWW lines

RMail is a lightweight mail library containing various
utility classes and modules that allow ruby scripts to
parse, modify, and generate MIME mail messages.

PR:             ports/153820
Submitted by:   Eric Freeman <freebsdports at chillibear.com>
Feature safe:   yes