fix get ip6_addr setting

conf/scripts/route-down.d/20-unset-ipv6

@@ -7,7 +7,7 @@ is_ip6addr_set() {
   ip address show dev tun0 2> /dev/null | grep -q "${ip6_addr}/"
 }
 
-ip6_addr=$(ynh_setting_get vpnclient ip6_addr)
+ip6_addr=$(ynh_app_setting_get vpnclient ip6_addr)
 if [[ -n "${ip6_addr}" ]] && [[ "${ip6_addr}" != none ]] && is_ip6addr_set "${ip6_addr}"; then
   ip address delete "${ip6_addr}/64" dev tun0
 fi

conf/scripts/route-up.d/20-set-ipv6

@@ -7,7 +7,7 @@ is_ip6addr_set() {
   ip address show dev tun0 2> /dev/null | grep -q "${ip6_addr}/"
 }
 
-ip6_addr=$(ynh_setting_get vpnclient ip6_addr)
+ip6_addr=$(ynh_app_setting_get vpnclient ip6_addr)
 if [[ -n "${ip6_addr}" ]] && [[ "${ip6_addr}" != none ]] && ! is_ip6addr_set "${ip6_addr}"; then
   ip address add "${ip6_addr}/64" dev tun0
 fi