cleanup: Remove expired ports:

2022-09-30 shells/ksh2020: Upstream ksh2020 branch archived, development
continues under new ksh93 project

shells/ksh2020: Deprecate unmaintained ksh2020

ksh93 modernization development, which was halted in 2020, resulted in
the att/ast team saving the development in their ksh2020 branch and
reverting the mainline back to ksh93. Since the the ksh2020 developers
have forked ksh93 and resumed ksh2020 development under the ksh93
account in their ksh repository. Therefore the now "abandonware" ksh2020
ports is to be removed in favour of the shells/ksh or shells/ksh-devel
ports.

The shells/ksh port tracks releases while shells/ksh-devel tracks
development. shells/ksh93 is available for legacy applications that
require the original AT&T KSH93. The "co-existence" options of each
of these ports allow users to install shells/ksh (and/or ksh-devel) with
shells/ksh93 for users who wish to use the currently developed ksh93 but
still need the legacy AT&T ksh93 due to incompatibilties between the old
and the new. (Note: The latest CDE-25 develpment has switched to using the
new ksh93 shell.)

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.

*/*: Remove redundant '-*' from CONFLICTS definitions

The conflict checks compare the patterns first against the package
names without version (as reported by "pkg query "%n"), then - if
there was no match - agsinst the full package names including the
version (as reported by "pkg query "%n-%v").

Approved by: portmgr (blanket)

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

Remove # $FreeBSD$ from Makefiles.

Don't reassign the "len" variable and compute the exact spaces needed.

PR:		251275
Submitted by:	Romeo Rajomalaza <endian.sign _ gmail.com>
Reported by:	Romeo Rajomalaza <endian.sign _ gmail.com>
MFH:		2020Q4

att/ast on Github has branched ksh2020 and reverted mainline back to
ksh93u+ and v-. See github commit 0be82553e98be77238577bc0eaafda0f1cf807fe.

To learn how and why our att/ast upstream made this decision see
https://github.com/att/ast/issues/1464 and
https://github.com/att/ast/issues/1466.

The next steps will be to update shells/ksh93-devel to att/ast master.
shells/ksh93 will likely be based on att/ast master at
0be82553e98be77238577bc0eaafda0f1cf807fe or some future tag or branch.