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)

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

Support staging

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

- Fix check for FreeBSD 7.x. The current check ended up ignoring 8.x as
  well. [1]
- Trim Makefile headers.
- Reword the IGNORE message a little.

PR:		ports/174080
Submitted by:	dikshie <dikshie@lapi.itb.ac.id> (maintainer)

Fix OSVERSION check and remove consideration for <7 (bogus anyway)

PR:             ports/168279
Submitted by:   crees
Approved by:    dikshie@lapi.itb.ac.id (maintainer)

- Get Rid MD5 support

- Unbreak for 6X and 8X

PR:             149417
Submitted by:   dikshie <dikshie@lapi.itb.ac.id> (maintainer)

- Mark IGNORE'd on 7.X and up

PR:             ports/137157
Submitted by:   dikshie <dikshie@lapi.itb.ac.id> (maintainer)
Feature safe:   yes

- Update to 0.9.1

PR:             136901
Submitted by:   dikshie <dikshie@lapi.itb.ac.id> (maintainer)

ssmping is a tool for checking whether a host can receive SSM from
another. If a host runst ssmpingd, users on other hosts can check
that they receive from this host by running the ssmping tool.
asmping is similar to ssmping, but checks for ASM rather than SSM.

WWW: http://www.venaas.no/multicast/ssmping/

PR:             ports/102322
Submitted by:   dikshie <dikshie@lapi.itb.ac.id>
Approved by:    krion (mentor)