luci-mod-network: dhcp.js: fix default state of nonwildcard

Fixes: #3415
Signed-off-by: Jo-Philipp Wich <jo@mein.io>

modules/luci-mod-network/htdocs/luci-static/resources/view/network/dhcp.js

@@ -370,6 +370,7 @@ return L.view.extend({
 		o = s.taboption('general', form.Flag, 'nonwildcard',
 			_('Non-wildcard'),
 			_('Bind dynamically to interfaces rather than wildcard address (recommended as linux default)'));
+		o.default = o.enabled;
 		o.optional = false;
 		o.rmempty = true;