emulators/virtualbox-ose{,-nox11,-kmod,-additions,-additions-nox11}-legacy: fix
build with llvm15+, fix run with PAE on i386

* Fix build with llvm15+ from ports and from base:
  - ISO C++17 does not allow 'register' storage class specifier;
  - require -fPIC on i386.
* Fix load kernel modules on host and guest i386 if kernel compiled with
PAE option: add non-default option PAE to ports.
Based on patches from mi@.

PR:		279257 224616
Approved by:	vbox (maintainer, timeout 1 month and 6 years)

*: Bump PORTREVISIONs for math/mpc update to 1.3.1

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.

emulators/virtualbox-ose-additions*: Bump portrevision.

Force update after xorg-server update. Sei PORTREVISION=0 on nox11
versions since those don't need reinstallation.

PR:		265731
Reported by:	O. Hartmann <ohartmann@walstatt.org>

*/*: Release my babies from my "created by" comments

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

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").

Approved by: portmgr (blanket)

emulators/virtualbox-ose: Update description and message files

- Add updated information about supported versions, installation
  commands and mitigation for a known issue.
- Removed reference to the wiki page.

Reviewed on github:

https://github.com/freebsd/freebsd-ports/pull/115

PR:             254412

emulators/virtualbox-ose-additions(-legacy): fix conflicts

- Add missing conflicts lines to emulators/virtualbox-ose-additions
  ports
- Remove duplicate entry in emulators/virtualbox-ose-additions-legacy
  CONFLICTS_INSTALL

PR:		256048

emulators/virtualbox-ose-legacy: limit portscout reporting

The VirtualBox legacy ports track version 5.x, limit portscout
reporting accordingly.

all: Remove all other $FreeBSD keywords.

Remove # $FreeBSD$ from Makefiles.

- Update VirtualBox OSE to 6.1.18
- Old VirtualBox OSE 5.2.44 preserved as "-legacy" versions of the
  ports (repocopied)
- Add back extra patch removed in r528258, actually required to
  build DEBUG kmod
- Correctly define WITH_DEBUG when enabling the DEBUG option, so
  binaries are not stripped

Please note that this new version supports only amd64 CPUs. If you need
to use older hardware please install the legacy ports.

Note that moving VM snapshots across major updates is unsupported, it's
strongly suggested to properly shutdown VMs before upgrading, please
check UPDATING for further details.