net/netcat: Workaround LLVM15 build errors

Circumvent LLVM build errors. Permanent fixes will come later.

While at it, assume care and feeding of this port.

MFH:		2023Q2

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: remove 'Created by' lines

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

  *  <ports@c0decafe.net>
  *  Aaron Dalton <aaron@FreeBSD.org>
  *  Aaron Straup Cope <ascope@cpan.org>
  *  Aaron Zauner <az_mail@gmx.at>
  *  Adam Jette <jettea46@yahoo.com>
  *  Adam Weinberger <adamw@FreeBSD.org>
  *  Alan Eldridge <alane@geeksrus.net>
  *  Alex Bakhtin <Alex.Bakhtin@gmail.com>
  *  Alex Deiter <Alex.Deiter@Gmail.COM>
  *  Alex Dupre <ale@FreeBSD.org>
  *  Alex Dupre <sysadmin@alexdupre.com>

Remove # $FreeBSD$ from Makefiles.

Drop the ipv6 virtual category for n* category as it is not relevant anymore

Remove NLS, DOCS, EXAMPLES and IPV6 from OPTIONS_DEFAULT, they are enabled by
default anyway and don't need to be listed

Approved by:	portmgr blanket

- Switch to USES=tar
- Pet portlint
- Switch to options helpers

MASTER_SITES cleanup.

- Replace ${MASTER_SITE_FOO} with FOO.
- Merge MASTER_SITE_SUBDIR into MASTER_SITES when possible. (This means 99.9%
  of the time.)
- Remove occurrences of MASTER_SITE_LOCAL when no subdirectory was present and
  no hint of what it should be was present.
- Fix some logic.
- And generally, make things more simple and easy to understand.

While there, add magic values to the FESTIVAL, GENTOO, GIMP, GNUPG, QT and
SAMBA macros.

Also, replace some EXTRACT_SUFX occurences with USES=tar:*.

Checked by:	make fetch-urlall-list
With hat:	portmgr
Sponsored by:	Absolight

Convert all :U to :tu and :L to :tl

Since FreeBSD 8.4 and FreeBSD 9.1 make(1) do support :tu and :tl as a
replacement for :U and :L (which has been marked as deprecated)

bmake which is the default on FreeBSD 10+ only support by default
:tu/:tl a hack has been added at the time to support :U and :L to ease
migration. This hack is now not necessary anymore

Note that this makes the ports tree incompatible with make(1) from
FreeBSD 8.3 or earlier

With hat:	portmgr

- Stage support
- Use OPTIONS helpers

Add NO_STAGE all over the place in preparation for the staging support (cat:
net)

- Update MASTER_SITES and WWW: line
- Cleanup pkg-descr
- Switch to optionsng

PR:           ports/169420
Submitted by: KATO Tsuguru <tkato432 _at_ yahoo.com>
Approved by:  beat (mentor)

- Get Rid MD5 support

Fix the name of the manpage

Fix DOCSDIR in the manual and drop my maintainership.

Pointed out by Jim Long <james@umpquanet.com>

- rename nc to netcat to prevent /usr/bin/nc from shadowing
  /usr/local/bin/nc

PR:             ports/11970
Submitted by:   Jonathan Liu <Net147@hotmail.com>
Approved by:    maintainer timeout (sumikawa ; 960 days)

SHA256ify

Approved by: krion@

OPTIONify.

Requested by:   ignacio.arquelatour@gmail.com

Add the manpage.

Submitted by:   lee dilkie <lee@dilkie.com>
PR:             ports/68272

Use PLIST_FILES/DOCSDIR/PORTDOCS macros.
Remove pkg-plist.

Approved by:    sumikawa (maintainer)

Add SIZE.

Submitted by:   trevor

Clear moonlight beckons.
Requiem mors pacem pkg-comment,
And be calm ports tree.

E Nomini Patri, E Fili, E Spiritu Sancti.

- Support for IPv6   - Take maintainership    

Master sites go away, new ones come...    

Add $FreeBSD$, which help me in problem reports.    

Update master sites.    

Convert category net to new layout.  

Enable `TELNET' and `GAPING_SECURITY_HOLE'.