sysutils/xvidcap: Deprecate and set expiration date to 2022-06-30

Abandoned upstream, depends on deprecated GTK2 and only supports legacy
video codecs (MPEG4 being the most recent).

PR:		264189
Reviewed by:	thierry (maintainer)

sysutils/xvidcap/Makefile

@@ -12,6 +12,9 @@ COMMENT=		Capture your X display to individual frames or MPEG video
 
 LICENSE=		GPLv3
 
+DEPRECATED=		Abandoned upstream, depends on deprecated GTK2 and only supports legacy video codecs. Please consider using multimedia/obs-studio
+EXPIRATION_DATE=	2022-06-30
+
 LIB_DEPENDS=		libdbus-1.so:devel/dbus			\
 			libfreetype.so:print/freetype2		\
 			libswscale.so:multimedia/ffmpeg		\