*/*: preserve all WWWs for my ports

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 useless Created by: headers mentioning me

Remove # $FreeBSD$ from Makefiles.

Fix WWW

Approved by:	portmgr (blanket)

games/xtgyoretsu: document ncurses requirement (USES+=ncurses)

while here:
  * repect LDFLAGS
  * Also specify lncurses instead of lcurses.  On FreeBSD, libcurses is
    symlinked to lncurses, but the former does not exist in ports ncurses.

approved by:	infrastructure blanket

Update ports in the games category to not use GH_COMMIT.

With minor cleanups to make things simpler.

With hat:	portmgr
Sponsored by:	Absolight

XT gyoretsu - extended ncurses version of "Renshu-cho gyoretsu"

Goal of the game is to clear entire field by matching pairs of
neighbouring (adjacent or on the same line/column without any other
numbers in between) numbers, which must be either equal, or their
sum must be equal to strike out sum.

WWW: https://github.com/Penguinum/xtgyoretsu-forked/
WWW: http://saahriktu.org/games.html