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.

net/openmdns: amend the previous fix (add two more missing free() calls).

PR:	249296

net/openmdns: fix daemon memory leaks in various expected paths.

PR:	249296

net/openmdns: Update pkg-descr to include "Zeroconf" word.

Reported by:	Sid <sid@bsdmail.com>

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

all: Remove all other $FreeBSD keywords.

Remove # $FreeBSD$ from Makefiles.

Fix build with -fno-common

While here regenerate patch files with make makepatch.

net/openmdns: drop maintainership

dns/openmdns: revert unintentional and broken r531034

make[2]: "/usr/share/mk/bsd.opts.mk" line 103: "NO_PROFILE is defined, but
deprecated. Please use MK_PROFILE=no instead."

dns/openmdns: update to 0.7.10

Changes:	https://github.com/haesbaert/mdnsd/compare/0.7...b1c3540

Simplify port-specific manpages location after r523104

Not all of my ports are covered because:
- USES=cmake requires patching devel/cmake to undo BSD-specific defaults
  (A good example why BSD quirks should stay in ports, not to be upstreamed)
- USES=meson and GNU_CONFIGURE require dropping --mandir argument
- ponscripter-sekai requires Templates/BSD.local.dist to NOT create PREFIX/man

devel/libevent2: update to 2.1.11

Changes:	https://github.com/libevent/libevent/releases/tag/release-2.1.11-stable
ABI:		https://abi-laboratory.pro/tracker/timeline/libevent/
PR:		239599
Reported by:	GitHub (watch releases)
Approved by:	zeising (maintainer)
MFH:		2019Q3 (maybe security, partially restores 2.1.8 ABI)
Differential Revision:	https://reviews.freebsd.org/D21133

net/openmdns: unbreak on DragonFly

packet.c: In function 'pkt_process':
packet.c:405:3: warning: implicit declaration of function 'LIST_FOREACH_SAFE';
did you mean 'RB_FOREACH_SAFE'? [-Wimplicit-function-declaration]
   LIST_FOREACH_SAFE(rr, &pkt->arlist, pentry, rraux) {
   ^~~~~~~~~~~~~~~~~
   RB_FOREACH_SAFE
packet.c:405:39: error: 'pentry' undeclared (first use in this function); did
you mean 'rtentry'?
   LIST_FOREACH_SAFE(rr, &pkt->arlist, pentry, rraux) {
                                       ^~~~~~
                                       rtentry
packet.c:405:39: note: each undeclared identifier is reported only once for each
function it appears in
packet.c:405:53: error: expected ';' before '{' token
   LIST_FOREACH_SAFE(rr, &pkt->arlist, pentry, rraux) {
                                                     ^~
                                                     ;

Reported by:	DPorts (via muscles)

Reorganize some my ports for better discoverability

devel/onscripter{,-1byte} -> games/onscripter{,-1byte}
devel/ponscripter-sekai -> games/ponscripter-sekai
devel/renpy{,6} -> games/renpy{,6}
devel/rlvm -> games/rlvm
dns/openmdns -> net/openmdns (where Bonjour and Avahi are)