audio/gnuitar: Update WWW

- Mark DEPRECATED as last upstream release was in 2005 and WWW also
  returns NXDOMAN
- Set EXPIRATION_DATE 2024-04-17

audio/gnuitar/Makefile

 PORTNAME=	gnuitar
 PORTVERSION=	0.3.2
-PORTREVISION=	10
+PORTREVISION=	11
 CATEGORIES=	audio multimedia
 MASTER_SITES=	SF
 
 MAINTAINER=	bofh@FreeBSD.org
 COMMENT=	Real-time guitar processor
-WWW=		http://www.gnuitar.com
+WWW=		https://sourceforge.net/projects/gnuitar/
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
 
+DEPRECATED=	Unmaintained, last upstream release in 2005
+EXPIRATION_DATE=2024-04-17
+
 LIB_DEPENDS=	libfontconfig.so:x11-fonts/fontconfig \
 		libfreetype.so:print/freetype2 \
 		libharfbuzz.so:print/harfbuzz