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.

audio: remove 'Created by' lines

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

  *  <dmagda+libsamplerate@ee.ryerson.ca>
  *  <trasz@FreeBSD.org>
  *  Adam Weinberger
  *  Adam Weinberger <adamw@FreeBSD.org>
  *  Akinori MUSHA aka knu <knu@idaemons.org>
  *  Aleksander Fafula <alex@bsdguru.org>
  *  Alex Allan <alex@kamaz.org.uk>
  *  Alexander Botero-Lowry <alex@foxybanana.com>
  *  Alexander Kojevnikov <alexander@kojevnikov.com>
  *  Alexander Nedotsukov <bland@FreeBSD.org>
  *  Alexander Vereeken <Alexander88207@protonmail.com>

Remove # $FreeBSD$ from Makefiles.

audio/ruby-smf: convert to USES=shebangfix

- Update to 0.15.15 and unbreak this port with Ruby 2.2
- Add EXAMPLES option: use PORTEXAMPLES for RUBY_MODEXAMPLESDIR to pet portlint
- Update WWW

audio/ruby-smf: mark broken with ruby 2.2

Fix plist while here

Cleanup plist

Add OPTIONS_DEFINE=DOCS for ports with %%PORTDOCS%% in the plist.

Where possible, correct a few instances where PORTDOCS was being used
to flag stuff in EXAMPLESDIR. For some ports, mostly those owned by
ruby@, PORTDOCS is applied to pretty much everything whether it's
documentation or example.

- Stage support

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

- Remove Author line

- Use single space after WWW:

Send ports@ ruby ports over ruby@
most of these were from stas@

- Return my ports back to the pool.  I was unable to make any fixes to
  my ports in the past 3 weeks while ports were broken on any 10.x
  machines, which means I'm unable to maintain them.  So let people know
  that there's no available support for them until things are back to
  normal (which also means that anyone with spare time will be able
  to fix them without getting approval).

- Get Rid MD5 support

Clean up ruby pkg-plists:
    %%RUBY_SITEARCHLIBDIR%%
    %%RUBY_SITELIBDIR%%
    lib/ruby/site_ruby
    %%RUBY_VENDORARCHLIBDIR%%
    %%RUBY_VENDORLIBDIR%%
    lib/ruby/vendor_ruby
    lib/ruby

Above directories are owned by lang/ruby1[89] ports.

PR:         ports/153041
Tested by:  2-exp runs by pav
With Hat:   ruby@

- Update to 0.15.12.

- Update to 0.15.11.

- Update to 0.15.10.

- Update to 0.15.8.

- Update to 0.15.7
- Shebang-patch the examples
- Take maintainership

- Update to 0.14.3

PR:             96788
Submitted by:   "Aleksander Fafula" <alex___fafula.com>

- Add some SHA256 checksums

With portmgr hat on, reset maintainership of knu's ports since he has
been inactive more than 6 months.  We hope to see him back sometime.

Update to 0.14.2.

Add SIZE data.

Submitted by:   trevor

Update to 0.14.

Update to 0.13.2.

De-pkg-comment.

Use RUBY_MOD*.

Update to 0.12.

Add ruby-smf 0.11.5, a Ruby module to handle Standard MIDI Files.