net/mDNSResponder: Convert to master port

Convert to master port of dns/mDNSResponder_nss (slave port).

PR:		256955
Approved by:	maintainer timeout, >2 weeks

net/mDNSResponder/Makefile

@@ -1,12 +1,12 @@
 PORTNAME=	mDNSResponder
-PORTVERSION=	1790.80.10
-PORTREVISION=	1
-CATEGORIES=	net dns
+PORTVERSION=	1790.80.10	# Reset PORTREVISION on slave port (dns/mDNSResponder_nss) after update
+PORTREVISION?=	1
+CATEGORIES?=	net dns
 MASTER_SITES=	https://opensource.apple.com/tarballs/mDNSResponder/
 
-MAINTAINER=	sunpoet@FreeBSD.org
-COMMENT=	Bonjour (zero-configuration networking) by Apple
-WWW=		https://developer.apple.com/bonjour/ \
+MAINTAINER?=	sunpoet@FreeBSD.org
+COMMENT?=	Bonjour (zero-configuration networking) by Apple
+WWW?=		https://developer.apple.com/bonjour/ \
 		https://github.com/apple-oss-distributions/mDNSResponder
 
 LICENSE=	APACHE20 BSD3CLAUSE
@@ -31,7 +31,7 @@ EXTRA_MAN8=	dnsextd.8 mDNSResponderPosix.8
 EXTRA_SBIN=	dnsextd
 
 # lib/libdns_sd.so.1 sbin/mdnsd
-CONFLICTS_INSTALL=	avahi-libdns openmdns
+CONFLICTS_INSTALL?=	avahi-libdns openmdns
 
 OPTIONS_DEFINE=	IPV6