security/libreswan: Unbundle unbound-event.h

Use the header from dns/unbound.

PR:		263838
Reported by:	Andrew Cagney <andrew.cagney@gmail.com>

security/libreswan/Makefile

@@ -1,5 +1,6 @@
 PORTNAME=	libreswan
 DISTVERSION=	4.7
+PORTREVISION=	1
 CATEGORIES=	security
 MASTER_SITES=	https://download.libreswan.org/
 
@@ -11,6 +12,7 @@ LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 BUILD_DEPENDS=	gawk:lang/gawk \
+		${NONEXISTENT}:dns/unbound:patch \
 		xmlto:textproc/xmlto # build requires xmlto, but manpages aren't installed: https://github.com/libreswan/libreswan/issues/479
 LIB_DEPENDS=	libcurl.so:ftp/curl \
 		libevent.so:devel/libevent \
@@ -21,6 +23,8 @@ LIB_DEPENDS=	libcurl.so:ftp/curl \
 
 USES=		bison cpe gmake pkgconfig python
 
+UNBOUND_WRKSRC=	`${MAKE} -C ${PORTSDIR}/dns/unbound -V WRKSRC`
+
 CFLAGS+=	-I${WRKSRC}/include/unbound
 
 MAKE_ARGS=	PKG_BASE=${LOCALBASE} \
@@ -35,6 +39,9 @@ BINARY_ALIAS=	awk=gawk
 
 OPTIONS_DEFINE=	DOCS
 
+post-patch:
+	@${RM} ${WRKSRC}/include/unbound/unbound-event.h && ${LN} -s ${UNBOUND_WRKSRC}/libunbound/unbound-event.h ${WRKSRC}/include/unbound/unbound-event.h
+
 post-configure:
 	@cd ${WRKSRC}/mk/defaults && \
 		${RLN} netbsd.mk freebsd.mk