unbound: Update to 1.23.1

Release notes at
	https://nlnetlabs.nl/news/2025/Jul/16/unbound-1.23.1-released/

Since we don't enable ECS, this is mostly a nop for us.

Merge commit 'c8864f6ba46ff3271d97b4ae1c3cc6ce01eaf18a'

MFC after:	3 days

lib/libunbound/Makefile

@@ -13,23 +13,20 @@ PACKAGE=	unbound
 CFLAGS+= -I${UNBOUNDDIR} -I${LDNSDIR} -I${.OBJDIR} -I${.CURDIR}
 CFLAGS+= -DOPENSSL_API_COMPAT=0x10100000L
 
-SRCS=	alloc.c as112.c authzone.c autotrust.c cachedb.c config_file.c \
-	configlexer.l configparser.y context.c dname.c dns.c dns64.c \
-	dnstree.c edns.c fptr_wlist.c infra.c iter_delegpt.c iter_donotq.c \
-	iter_fwd.c iter_hints.c iter_priv.c iter_resptype.c iter_scrub.c \
-	iter_utils.c iterator.c keyraw.c libunbound.c libworker.c \
-	listen_dnsport.c localzone.c locks.c log.c lookup3.c lruhash.c \
-	mesh.c mini_event.c modstack.c module.c msgencode.c msgparse.c \
-	msgreply.c net_help.c netevent.c outbound_list.c outside_network.c \
-	packed_rrset.c parse.c parseutil.c proxy_protocol.c \
-	random.c rbtree.c redis.c \
-	regional.c respip.c rfc_1982.c rpz.c rrdef.c rrset.c rtt.c sbuffer.c \
-	siphash.c slabhash.c \
-	str2wire.c tcp_conn_limit.c timehist.c timeval_func.c \
-	tube.c ub_event_pluggable.c \
-	val_anchor.c val_kcache.c val_kentry.c val_neg.c val_nsec.c \
-	val_nsec3.c val_secalgo.c val_sigcrypt.c val_utils.c validator.c \
-	view.c winsock_event.c wire2str.c
+SRCS=	alloc.c as112.c authzone.c autotrust.c config_file.c configlexer.l \
+	configparser.y context.c dname.c dns.c dns64.c dnstree.c edns.c \
+	fptr_wlist.c infra.c iter_delegpt.c iter_donotq.c iter_fwd.c \
+	iter_hints.c iter_priv.c iter_resptype.c iter_scrub.c iter_utils.c \
+	iterator.c keyraw.c libunbound.c libworker.c listen_dnsport.c \
+	localzone.c locks.c log.c lookup3.c lruhash.c mesh.c mini_event.c \
+	modstack.c module.c msgencode.c msgparse.c msgreply.c net_help.c \
+	netevent.c outbound_list.c outside_network.c packed_rrset.c parse.c \
+	parseutil.c proxy_protocol.c random.c rbtree.c regional.c respip.c \
+	rfc_1982.c rpz.c rrdef.c rrset.c rtt.c sbuffer.c siphash.c \
+	slabhash.c str2wire.c tcp_conn_limit.c timehist.c timeval_func.c \
+	tube.c ub_event_pluggable.c val_anchor.c val_kcache.c val_kentry.c \
+	val_neg.c val_nsec.c val_nsec3.c val_secalgo.c val_sigcrypt.c \
+	val_utils.c validator.c view.c winsock_event.c wire2str.c
 
 WARNS?=	2
 NO_WTHREAD_SAFETY= true