luci-mod-network: Add flag for address_as_local

'Addresses' option entries in the general tab of DHCP and DNS settings are
sometimes (I'm not sure about the exact conditions) passed to upstream resolver,
bypassing local resolution.

A workaround for a small list of domains is to add them to 'Resolve these
locally' option, but this is very tedious to do, and dnsmasq limits it to 1024
characters.

openwrt/openwrt#18610 adds behaviour to add addresses to the local resolution
list automatically, and this commit adds a flag to LuCI to control that.

Signed-off-by: Marko Zajc <[email protected]>

Author: markozajc

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

@@ -323,6 +323,11 @@ return view.extend({
 		o.optional = true;
 		o.datatype = 'uinteger';
 		o.placeholder = 150;
+
+		o = s.taboption('general', form.Flag, 'address_as_local',
+			_('Resolve addresses locally'),
+			_('Never send queries for FQDNs in the Address option to an upstream resolver.'));
+		o.optional = true;
 		// End general
 
 		// Begin devices