hostapd: initial prototype of an ubus binding

Supports listing, removing and banning clients, and hooking into
probe/assoc/auth requests via object subscribe.

git-svn-id: svn://svn.openwrt.org/openwrt@36081 3c298f89-4303-0410-b956-a3cf2f4a3e73
build: make the color of the 'configuration out of sync' warning red to make it harder for users to overlook

git-svn-id: svn://svn.openwrt.org/openwrt@36082 3c298f89-4303-0410-b956-a3cf2f4a3e73