security/fwbuilder: Deprecate abaondonware

fwbuilder fails to build for many errors due to enforced C++17
standard, i.e. throw. In addition, fwbuilder was abandoned by its
original author when he got a job with a firewall company. Since
then it's maintenance was assumed by someone on github. Unfortunately,
he made a few tweaks but failed to make any other commits since
January 2021. Therefore this port is flagged as broken under 14-CURRENT
and deperecated. It will be removed at the end of 2023Q3.

I had stopped using this port a few years ago because it didn't support
IPv6. I was hoping whoever did take on upstream maintainership on GH
would implement IPv6 support. But they didn't. Therefore I am dropping
maintainership as well.

security/fwbuilder/Makefile

@@ -4,10 +4,14 @@ PORTREVISION=	2
 DISTVERSIONPREFIX=	v
 CATEGORIES=	security
 
-MAINTAINER=	cy@FreeBSD.org
+MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Firewall Builder GUI and policy compilers
 WWW=		https://github.com/fwbuilder/fwbuilder
 
+DEPRECATED=	Abandonware since Jan 2021
+EXPIRATION_DATE=	2023-09-30
+
+BROKEN_FreeBSD_14=	Fails to build under LLVM16 with C++17 standard
 BROKEN_FreeBSD_12_powerpc64=	fails to configure on powerpc64 elfv1: libz library not found
 
 LIB_DEPENDS=	libxslt.so:textproc/libxslt \