KDE: It goes to 6!

This megacommit merges all the work from
https://github.com/freebsd/freebsd-ports-kde/tree/kde-it_goes_to_6
Specifically:
- KDE Plasma 6 ports updated to 6.2.5
- KDE Applications ports updated to 24.12.0
- Development ports of KDE Applications removed
- A lot of various ports switched to Qt 6 by default
- Some KDE Frameworks 5 and Plasma 5 ports are adapted to be coinstallable
  with their 6 counterparts

PR:		284351
Exp-run by:	antoine
Pull Request:	https://github.com/freebsd/freebsd-ports/pull/341

Co-authored-by:	Max Brazhnikov <makc@FreeBSD.org>
Co-authored-by:	Kenneth Raplee <kenrap@kennethraplee.com>
Co-authored-by:	Jason E. Hale <jhale@FreeBSD.org>
Co-authored-by:	Gleb Popov <arrowd@FreeBSD.org>

audio/opus: bump consumers after update to 1.4

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.

One more small cleanup, forgotten yesterday.
Reported by:	lwhsu

Remove # $FreeBSD$ from Makefiles.

Update KDE Apps to 20.08.3

Some of our projects release on their own timescale and some get released
en-masse. The 20.08.3 bundle of projects was released today with dozens of
bugfixes and will be available through app stores and distros soon. See the
20.08.3 releases page for details.

Some of the fixes in today's releases:

    * Gwenview no longer accidentally shows the thumbnail view as a separate
window with newer Qt versions
    * Sending SMS with KDEConnect has been restored
    * Fixed a possible Okular crash when selecting text in annotations

Announcement:
	https://kde.org/announcements/releases/2020-11-apps-update/

Changelog:
	https://kde.org/announcements/fulllog_releases-20.08.3/

games/kdegames: add some more KDE games to the metaport

PR:		247911
Submitted by:	anahata <cnehren@pobox.com>

games/kdegames: add option of games/ksudoku

PR:		247897
Reported by:	anahata <cnehren@pobox.com>

Give KDE games back a useful COMMENT after r518382

Pointy hat:	tobik

games/kdegames: Canonicalize option names

/!\ kdegames-19.08.3: Makefile warnings, please consider fixing /!\

These options name have characters outside of [-_A-Z0-9]:

bomber bovo granatier kapman katomic kblackbox kblocks kbounce kbreakout
kdiamond kfourinline killbots kiriki kjumpingcube klickety klines kmahjongg
kmines knavalbattle knetwalk knights kolf kollision kpat kshisen ksirk ksquares
ktuberling picmi

Approved by:	kde (tcberner, in D22540)

Update KDE Applications to 18.12.2

[1] https://www.kde.org/announcements/announce-applications-18.12.2.php
[2]
https://www.kde.org/announcements/fulllog_applications-aether.php?version=18.12.2

Fix Qt5 symbol version scripts to put the catch-all clause first.  When
a symbol matches multiple clauses the last one takes precedence.  If the
catch-all is last it captures everything.  In the case of Qt5 libraries
this caused all symbols to have a Qt_5 label while some should have
Qt_5_PRIVATE_API.  This only affects lld because GNU ld always gives the
catch-all lowest priority.

Older versions of Qt5Webengine exported some memory allocation symbols from
the bundled Chromium.  Version 5.9 stopped exporting these [1] but the
symbols were kept as weak wrappers for the standard allocation functions to
maintain binary compatibility. [2][3]  The problem is that the call to the
standard function in these weak wrappers is only resolved to the standard
function if there's a call to this standard function in other parts of
Qt5Webengine, because only then is there a non-weak symbol that takes
precedence over the weak one.  If there's no such non-weak symbol the call

Update KDE Applications to 18.12.1

Release Announcement:
	https://www.kde.org/announcements/announce-applications-18.12.1.php

Today KDE released the first stability update for KDE Applications 18.12.
This release contains only bugfixes and translation updates, providing a
safe and pleasant update for everyone.

About 20 recorded bugfixes include improvements to Kontact, Cantor, Dolphin,
JuK, Kdenlive, Konsole, Okular, among others.

Improvements include:
  *  Akregator now works with WebEngine from Qt 5.11 or newer
  *  Sorting columns in the JuK music player has been fixed
  *  Konsole renders box-drawing characters correctly again

You can find the full list of changes here:
	https://www.kde.org/announcements/fulllog_applications-aether.php?version=18.12.1

Readd the DESC for games/kajongg in games/kdegames/Makefile.common

Otherwise it has an empty COMMENT.

Reported by:	amdmi3

New ports: KDE Applicationsa games/

* games/kblackbox
* games/kmahjongg
* games/palapeli
* games/ktuberling
* games/klines
* games/kjumpingcube
* games/picmi
* games/ksquares
* games/kolf
* games/kmines
* games/kdiamond
* games/kpat
* games/lskat