audio/libcddb: Deprecate and set expiration date to 2024-07-31

CDDB services have been discontinued multiple times or services have
switched to non user and/or privacy friendly practices. There's no easy
way to contribute and focus has shifted to other services such as
Musicbrainz. Due to this sunset support in tree.

References:
https://en.wikipedia.org/wiki/Gracenote
https://hydrogenaud.io/index.php/topic,125880.0.html

audio/libcddb/Makefile

@@ -11,6 +11,9 @@ WWW=		https://libcddb.sourceforge.net/
 LICENSE=	LGPL20+
 LICENSE_FILE=	${WRKSRC}/COPYING
 
+DEPRECATED=	Multiple services have been shutdown and there's no way to easily submit data
+EXPIRATION_DATE=2024-07-31
+
 GNU_CONFIGURE=	yes
 USES=		iconv libtool localbase pathfix tar:bzip2
 USE_LDCONFIG=	yes