unbound: fix create_host_record_from_host error when dns is not set

The function `create_host_record_from_host` fails if the `dns` option
is not set in the host entry.
This sets a default to the `dns` variable in order to fix this error.

Fixes: #22691

Signed-off-by: Julien Cassette <julien.cassette@gmail.com>

net/unbound/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=unbound
 PKG_VERSION:=1.19.0
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://nlnetlabs.nl/downloads/unbound

net/unbound/files/dnsmasq.sh

@@ -107,7 +107,7 @@ create_host_record_from_host() {
   local dns ip name
 
   # basefiles dhcp "host" clause which means host A and PTR records
-  config_get dns  "$cfg" dns
+  config_get dns  "$cfg" dns 0
   config_get ip   "$cfg" ip
   config_get name "$cfg" name