Remove expired ports:

Adjusted for ports rescued since r534032

2020-05-05 audio/festvox-czech: Broken for more than 6 months
2020-05-05 audio/gkrellmvolume2: Broken for more than 6 months
2020-05-05 audio/mixmos: Broken for more than 6 months
2020-05-05 audio/mma: Broken for more than 6 months
2020-05-05 audio/pd-cyclone: Broken for more than 6 months
2020-05-05 audio/shorten: Broken for more than 6 months
2020-05-05 audio/taglib-sharp: Broken for more than 6 months
2020-05-05 audio/xhippo: Broken for more than 6 months
2020-05-05 biology/consed: Broken for more than 6 months
2020-05-05 biology/plinkseq: Broken for more than 6 months
2020-05-05 biology/seqtools: Broken for more than 6 months

Deprecate ports broken for more than 6 months

Mark a few ports BROKEN (unfetchable)

Convert to UCL & cleanup pkg-message (categories s)

- Fix shebangs

Submitted by:	Jochen Neumeister

- Fix trailing whitespace in pkg-messages

Approved by:	portmgr blanket

Remove ${PORTSDIR}/ from dependencies, categories r, s, t, and u.

With hat:	portmgr
Sponsored by:	Absolight

Remove OSVERSION checks that do not make sense any more.

For example (${OSVERSION} >= 900000 && ${OSVERSION} < 900021) is always true,
as is (${OSVERSION} > 900002 || ${OSVERSION} < 900000 && ${OSVERSION} > 800107).

Regarding patches, when an EXTRA_PATCHES is no longer needed, I remove it, when
it is always needed, I renamed it, in one case, I merged two patches.

Differential Revision:	https://reviews.freebsd.org/D2209

- Convert ports of sysutils/ to new USES=python

Approved by:	portmgr (implicit)

- Add new port sysutils/realsync

realsync daemon with rsync and python:
- config support /usr/local/etc/realsync.cfg
- e-mail stats support
- threads support
- threads wait support

PR:		ports/185774
Submitted by:	Krasimir Nachev <krasi@it-sys.org>