mail/imap-uw: Mark DEPRECATED

- Upstream last release was in 2007
- Known to have multiple bugs and vulnerabilities
- Use the more recent mail/panda-imap
- Set EXPIRATION_DATE to 2023-12-16

mail/imap-uw/Makefile

@@ -17,6 +17,9 @@ WWW=		http://www.washington.edu/imap/
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
+DEPRECATED=	Last upstream release was in 2007 so use the fork mail/panda-imap
+EXPIRATION_DATE=	2023-12-16
+
 LIB_DEPENDS=	libc-client4.so.9:mail/cclient
 
 CONFLICTS_INSTALL=	panda-imap # bin/dmail