unbound: add returncode to resolve function

this is used for time fix check.

Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>

src/initscripts/system/unbound

@@ -286,14 +286,18 @@ fix_time_if_dns_fails() {
 
 resolve() {
 	local hostname="${1}"
+	local found=1
 
 	local answer
 	for answer in $(dig +short A "${hostname}"); do
 		# Filter out non-IP addresses
 		if [[ ! "${answer}" =~ \.$ ]]; then
+			found=0
 			echo "${answer}"
 		fi
 	done
+
+	return ${found}
 }
 
 # Sets up Safe Search for various search engines
@@ -607,7 +611,7 @@ case "$1" in
 		;;
 
 	resolve)
-		resolve "${2}"
+		resolve "${2}" || exit $?
 		;;
 
 	*)