Also cleanups from portlint, etc.

PR:	287052

Convert the USE_LDAP=yes to USES=ldap and adds the following features:

- Adds the argument USES=ldap:server to add openldap2{4|5|6}-server as
  RUN_DEPENDS
- Adds the argument USES=ldap<version> and replaces WANT_OPENLDAP_VER
- Adds OPENLDAP versions in bsd.default-versions.mk
- Adds USE_OPENLDAP/WANT_OPENLDAP_VER in Mk/bsd.sanity.mk
- Changes consumers to use the features

Reviewed by:	delphij
Approved by:	portmgr
Differential Revision: https://reviews.freebsd.org/D38233

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)

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.

This commit implements such a proposal and moves one of the WWW: entries
of each pkg-descr file into the respective port's Makefile. A heuristic
attempts to identify the most relevant URL in case there is more than
one WWW: entry in some pkg-descr file. URLs that are not moved into the
Makefile are prefixed with "See also:" instead of "WWW:" in the pkg-descr
files in order to preserve them.

There are 1256 ports that had no WWW: entries in pkg-descr files. These
ports will not be touched in this commit.

The portlint port has been adjusted to expect a WWW entry in each port
Makefile, and to flag any remaining "WWW:" lines in pkg-descr files as
deprecated.

Approved by:		portmgr (tcberner)

A big Thank You to the original contributors of these ports:

  *  A. Gabriel <backslash@BSDCode.org>
  *  Aaron Dalton <aaron@FreeBSD.org>
  *  Alexey Mikhailov <karma@ez.pereslavl.ru>
  *  Alfred Perlstein <alfred@FreeBSD.org>
  *  Andrew Pantyukhin <infofarmer@FreeBSD.org>
  *  Antonio Carlos Venancio Junior (<antonio@inf.ufsc.br>)
  *  Ben Hutchinson <benhutch@xfiles.org.uk>
  *  Bill Fumerola <billf@chc-chimes.com>
  *  Chess Griffin <chess@chessgriffin.com>
  *  Chris Piazza <cpiazza@FreeBSD.org>
  *  Craig Edwards <brain@mail1.chatspike.net>
  *  David Bushong <david+ports@bushong.net>
  *  David Taylor <davidt@yadt.co.uk>
  *  Dennis Herrmann <adox@mcx2.org>
  *  Dominic Marks <dom@cus.org.uk>
  *  Edini <ports@edini.net>
  *  Eugeny Kuzakov <CoreDumped@CoreDumped.null.ru>
  *  Evgueni V. Gavrilov <aquatique@rusunix.org>
  *  George Reid <greid@ukug.uk.freebsd.org>
  *  Gerrit Beine <tux@pinguru.net>
  *  Gustau Perez <gustau.perez@gmail.com>
  *  Hye-Shik Chang
  *  Jase Thew <freebsd@beardz.net>
  *  Jens Holmqvist <zparta@hispan.se>
  *  Jimbo Bahooli <griffin@blackhole.iceworld.org>
  *  Jonas Kvinge <jonas@night-light.net>
  *  Josh Paetzel <josh@tcbug.org>
  *  Julien Laffaye <kimelto@gmail.com>
  *  KIMURA Yasuhiro <yasu@utahime.org>
  *  Kirill Ponomarew <ponomarew@oberon.net>
  *  Kubilay Kocak <koobs@FreeBSD.org>
  *  Makoto Matsushita <matusita@FreeBSD.org>
  *  Martin Wilke <miwi@FreeBSD.org
  *  Martin Wilke <miwi@FreeBSD.org>
  *  Masahiro Teramoto <markun@onohara.to>
  *  Matthew West <mwest@uct.ac.za>
  *  Maxim Ignatenko
  *  Michael Ranner
  *  Oliver Eikemeier
  *  Philippe Audeoud <jadawin@tuxaco.net>
  *  Romain Tartiere <romain@blogreen.org>
  *  Rusmir Dusko <nemysis@FreeBSD.org>
  *  Sergey Skvortsov <skv@protey.ru>
  *  Shaun Amott <shaun@inerd.com>
  *  Steve Wills <swills@FreeBSD.org>
  *  TAKATSU Tomonari <tota@FreeBSD.org>
  *  TERAMOTO Masahiro <markun@onohara.to>
  *  Tim Bishop <tim@bishnet.net>
  *  Timothy Redaelli <drizzt@gufi.org>
  *  Travis Poppe <tlp@liquidx.org>
  *  Ulrich Spoerlein <q@uni.de>
  *  Vsevolod Stakhov <vsevolod@highsecure.ru>
  *  Walter Venable <weaseal@hotmail.com>
  *  Walter Venable <weaseal@users.sourceforge.net>
  *  Wen Heping <wenheping@gmail.com>
  *  Will Andrews <andrews@technologist.com>
  *  clement
  *  db
  *  elvstone@gmail.com
  *  gahr
  *  hrs
  *  ijliao
  *  koji@jet.es
  *  milki <milki@rescomp.berkeley.edu>
  *  perlguy@perlguy.com
  *  pgl@instinct.org
  *  sec@42.org
  *  tdb
  *  torstenb

With hat:	portmgr

PR:		263105

There have been lots of missing CONFLICTS_INSTALL entries, either
because conflicting ports were added without updating existing ports,
due to name changes of generated packages, due to mis-understanding
the format and semantics of the conflicts entries, or just due to
typoes in package names.

This patch is the result of a comparison of all files contained in
the official packages with each other. This comparison was based on
packages built with default options and may therefore have missed
further conflicts with optionally installed files.

Where possible, version numbers in conflicts entries have been
generalized, some times taking advantage of the fact that a port
cannot conflict with itself (due to logic in bsd.port.mk that
supresses the pattern match result in that case).

A few ports that set the conflicts variables depending on complex
conditions (e.g. port options), have been left unmodified, despite
probably containing outdated package names.

These changes should only affect the installation of locally built
ports, not the package building with poudriere. They should give an
early indication of the install conflict in cases where currently
the pkg command aborts an installation when it detects that an
existing file would be overwritten,

Approved by:	portmgr (implicit)

In the earlier net/openldap24-server commit, only those which depend on
net/openldap24-sasl-client were bumped. Bumping all dependent port that
didn't get a bump to force a rebuild of these packages.

Suggested by:	kib