mail/opendmarc: Fix crash on FreeBSD >= 14.1

PR:		279780
Obtained from:	https://github.com/trusteddomainproject/OpenDMARC/issues/245
Tested by:	leres, John R <gamer@ryppn.com>
Approved by:	hrs (mentor), maintainer timeout (6 weeks)

mail/opendmarc/Makefile

 PORTNAME=	opendmarc
 PORTVERSION=	1.4.2
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	mail security
 MASTER_SITES=	GH
 

mail/opendmarc/files/patch-libopendmarc_opendmarc__dns.c

+--- libopendmarc/opendmarc_dns.c.orig	2021-12-20 06:40:37 UTC
++++ libopendmarc/opendmarc_dns.c
+@@ -203,6 +203,7 @@ dmarc_dns_get_record(char *domain, int *reply, char *g
+ 		++bp;
+ 
+ #ifdef HAVE_RES_NINIT   
++	memset(&resp, '\0', sizeof resp);
+ 	res_ninit(&resp);
+ #ifdef RES_USE_DNSSEC
+ 	resp.options |= RES_USE_DNSSEC;