*/*: llvm15 build fixes

llvm15 was also merged into 13.2-STABLE effective from OSVERSION
1302505. Fix the ports that failed to build with llvm15.

Approved by:	portmgr (blanket)

archivers/squsq: Unbreak on HEAD

- Pet portclippy
- Update MASTER_STES and remove unreachable URLs

archivers: remove 'Created by' lines

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

  *  Aaron Dalton <aaron@FreeBSD.org>
  *  Akinori MUSHA aka knu <knu@idaemons.org>
  *  Albert Vernon <f3cun3c02@sneakemail.com>
  *  Alex Dupre <ale@FreeBSD.org>
  *  Alex Samorukov <samm@freebsd.org>
  *  Alexander Kuehn <freebsd@nagilum.org>
  *  Alexander Logvinov <ports@logvinov.com>
  *  Alexander Zhuravlev <zaa@zaa.pp.ru>
  *  Alexey Dokuchaev <danfe@FreeBSD.org>
  *  Alexey Dokuchaev <danfe@regency.nsu.ru>
  *  Anders Nordby <anders@FreeBSD.org>

Fix CONFLICTS entries in archivers, astro, audio

Fix conflicts entries based on a script that searches for duplicate
files installed by several ports.

Some patters seem to make ports conflict with themselves, but this is
actually not the case due to the check-*-conflicts logic implemented
in bsd.port.mk, which excludes self-conflicts.

PHP based ports have been ignored in this commit as requested by the
committers currently working on the php-8.1 import.

Approved by:	portmgr (implicit)

*/*: Remove redundant '-[0-9]*' from CONFLICTS

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").

Many CONFLICTS definitions used patterns like "bash-[0-9]*" to filter
for the bash package in any version. But that pattern is functionally
identical with just "bash".

Approved by:	portmgr (blanket)

all: Remove all other $FreeBSD keywords.

Remove # $FreeBSD$ from Makefiles.

- Store distfile LOCAL'ly to unbreak fetch
- Install ``readme'' file as documentation

Mark BROKEN: unfetchable

Cleanup patches, a* categories.

Rename them to follow the make makepatch naming, and regenerate them.

With hat:	portmgr
Sponsored by:	Absolight

Start cleaning up some of the uselessly ambigious patches named
patch-xy, and giving them proper names.

- Support STAGEDIR

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

- Respect CFLAGS
- Unbreak with clang using -Wno-error=return-type (old K&R code)

Approved by:	miwi, eadler (mentors, implicit)

For a number of ports in archives category, trim the header and drop leading
indefinite article from COMMENT line; also fix few noticed styles bugs while
I am here.

- Get Rid MD5 support

With hat:       portmgr (myself)

- Add port lang/squirrel
- Register conflicts with archivers/squsq

Squirrel is a high level imperative/OO programming language, designed
to be a powerful scripting tool that fits in the size, memory bandwidth,
and real-time requirements of applications like games. However Squirrel
offers a wide range of features like dynamic typing, delegation, classes
& inheritance, higher order functions, generators, coroutines, tail
recursion, exception handling, automatic memory management, weak
references, etc.

Squirrel is inspired by languages like Python, Javascript and especially
Lua. The API is very similar and the table code is based on the Lua one.

WWW: http://squirrel-lang.org/
Author: Alberto Demichelis <alberto@ademichelis.com>

- Add SHA256

Move package files from plist to Makefile, remove pkg-plist.

Add SIZE.

- Fix MASTER_SITES

PR:             57292
Submitted by:   Mark Linimon <linimon@lonesome.com>

New port: squsq

Compressor/decompressor for CP/M "Squeeze" compressed files.

Submitted by:   Alexey Dokuchaev
Obtained from:  NetBSD