-Split ntpdate off of ntpd's init-script, ntpd works properly without it
-Make ntpd start just after ntpdate (if both are installed)
-UCI config for ntpdate may be added, but ntpdate will be retired upstream in the future
git-svn-id: svn://svn.openwrt.org/openwrt/packages@10920 3c298f89-4303-0410-b956-a3cf2f4a3e73
