Individual commits:
Mk/bsd.port.mk: mark 13.0 as unsupported
x11/xorg-cf-files: remove support for FreeBSD < 6 (yes, pre-2008)
x11/xorg-cf-files: auto-reformat patches, no content changes
graphics/gpu-firmware-amd-kmod: do not check 13.0 anymore
deskutils/xdg-desktop-portal: remove check for 13.0
editors/imhex: remove compatibility for 13.0
editors/libreoffice: remove compatibility for 13.0
editors/openoffice-4: remove compatibility for 13.0
editors/openoffice-devel: remove compatibility for 13.0
emulators/linux_base-c7: remove compatiblity for 13.0
graphics/drm-kmod: remove detection for 13.0
graphics/linux-c7-libdrm: remove support for 13.0
math/igraph: remove support for 13.0
net/asterisk16: remove patches for ancient FreeBSD versions
net/asterisk16: regenerate patches
net/asterisk18: drop support for ancient FreeBSD versions
net/asterisk18: regenerate patches
sysutils/bhyve+: drop support for FreeBSD 13.0
sysutils/ebsnvme-id: drop support for FreeBSD 13.0
sysutils/openzfs-kmod: drop detection of FreeBSD 13.0
sysutils/openzfs: remove detection of FreeBSD 13.0
Tools/scripts/portsearch: Drop support for FreeBSD <= 4
While here, remove a stale $Id$
security/openssl*: drop now obsolete patches
www/firefox: generalize pkg-message a bit regarding hgame(4)