From: Tim Niemeyer <tim@tn-x.org>
Date: Sat, 8 Jul 2017 10:47:56 +0200
Subject: ntpd host as string

diff --git a/package/utils/busybox/files/sysntpd b/package/utils/busybox/files/sysntpd
index 52866ba32acd26a490f9c9024fc3e43e0f757496..b6b28cd02527b89c0a4cc2f9adef52bb4c8427b0 100755
--- a/package/utils/busybox/files/sysntpd
+++ b/package/utils/busybox/files/sysntpd
@@ -30,7 +30,7 @@ get_dhcp_ntp_servers() {
 
 validate_ntp_section() {
 	uci_load_validate system timeserver "$1" "$2" \
-		'server:list(host)' 'enabled:bool:1' 'enable_server:bool:0' 'use_dhcp:bool:1' 'dhcp_interface:list(string)'
+		'server:list(string)' 'enabled:bool:1' 'enable_server:bool:0' 'use_dhcp:bool:1' 'dhcp_interface:list(string)'
 }
 
 start_ntpd_instance() {