cleanup: Remove expired ports:

2021-10-31 devel/sdl_sge: Upstream no longer maintained
2021-12-31 net/appkonference: Outdated, depends on unsupported version of
net/asterisk
2021-12-31 dns/bind911: End of life, please migrate to a newer version of BIND9
2021-12-31 net/zebra: Abandoned upstream, last release in 2005. Consider
migrating to net/frr7 or net/bird2
2021-12-31 audio/osalp: Abandoned upstream, listed as beta and no new release
since 2008
2021-12-31 games/stransball2: Depends on expired devel/sdl_sge
2021-12-31 devel/rubygem-ruby-sdl-ffi: Depends on expired devel/sdl_sge
2021-12-31 devel/rubygem-rubygame: Depends on expired devel/sdl_sge
2021-12-31 devel/ruby-sdl: Depends on expired devel/sdl_sge
2021-12-31 games/magicmaze: Depends on expired devel/sdl_sge
2021-12-31 games/trophy: Depends on expired devel/clanlib1
2021-12-31 devel/clanlib1: Older than expired and removed devel/clanlib
2021-12-31 www/py-django31: Upgrade to Django 3.2+. Mainstream support ended
(April 6, 2021). Extended support ends December 2021. See
https://www.djangoproject.com/download/

audio/flake: Deprecate and set expiration date to 2021-12-31

Upstream lists software as beta, no new release since 2007
Users also reports bugs when libsndfile isn't utilized
Users are recommended to use audio/ffmpeg or audio/flac instead

Reference: https://hydrogenaud.io/index.php?topic=71984.0

PR:		258638
Approved by:	tcberner and lbartoletti (mentors)
Differential Revision:	https://reviews.freebsd.org/D32038

Remove # $FreeBSD$ from Makefiles.

Return dbn's ports to the pool after safekeeping his commit bit.

MASTER_SITES cleanup.

- Replace ${MASTER_SITE_FOO} with FOO.
- Merge MASTER_SITE_SUBDIR into MASTER_SITES when possible. (This means 99.9%
  of the time.)
- Remove occurrences of MASTER_SITE_LOCAL when no subdirectory was present and
  no hint of what it should be was present.
- Fix some logic.
- And generally, make things more simple and easy to understand.

While there, add magic values to the FESTIVAL, GENTOO, GIMP, GNUPG, QT and
SAMBA macros.

Also, replace some EXTRACT_SUFX occurences with USES=tar:*.

Checked by:	make fetch-urlall-list
With hat:	portmgr
Sponsored by:	Absolight

Convert all :U to :tu and :L to :tl

Since FreeBSD 8.4 and FreeBSD 9.1 make(1) do support :tu and :tl as a
replacement for :U and :L (which has been marked as deprecated)

bmake which is the default on FreeBSD 10+ only support by default
:tu/:tl a hack has been added at the time to support :U and :L to ease
migration. This hack is now not necessary anymore

Note that this makes the ports tree incompatible with make(1) from
FreeBSD 8.3 or earlier

With hat:	portmgr

Update my ports to be compliant with new USES framework and fix other issues.

Changes:
 * various: migrate USE_BZIP2 to USES=tar:bzip2
 * various: migrate USE_XZ to USES=tar:xz
 * multimedia/py-ffmpeg: add and prefer github (GH) as master site
 * ports-mgmt/portbuilder: specify license as BSD2CLAUSE (instead of just BSD)

Most ports are updated infrequently so a single batch commit is preferred over
collating changes per port.

Add stage support to audio/flake.

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

Import audio/flake's configure file about custom $CC.

Most of the parameters are picked up through environment variables however
CC is not one of them.

Reported by:	pkg-fallout@

Mark job unsafe
While here:
- Trim headers
- Convert to USES
- Remove code for unsupported version

Add audio/flake to the Port's Collection.

The Flake encoder project was started as a way for the author to learn more
about lossless audio encoding. The author chose the FLAC format because it is
open and well-documented. Although the FLAC reference encoder is also free and
open-source, the author's goal was to implement the standard from scratch as an
independent project. Flake is licensed under the GNU LGPL.

Once Flake progressed to a usable state, the author submitted the encoder to be
included as part of FFmpeg. It was included and improved upon by other FFmpeg
developers. Since then, Ithe author has added more features to Flake and
improved the encoding speed. The author plan to add some of these features into
FFmpeg as the encoder progresses.

There are both benefits and drawbacks to using Flake as a FLAC encoder
alternative. In its current state, Flake gives, on average, slightly better
compression than the FLAC reference encoder and is about twice as fast.
However, it does not currently implement all the advanced features such as
tagging, cuesheets, 24-bit audio, embedded pictures, and ogg encapsulation.
The author hopes to add these to Flake in future releases.

WWW: http://flake-enc.sourceforge.net

Approved by:	bdrewery (mentor)