modules/admin-full: don't bother with 4k vlan / no 4k vlan nuisances, simply enable it when available

modules/admin-full: remove associated network for the wifi-iface as well if it would be empty afterwards

modules/admin-full: fix wifi join when "wwan" (or other iface) already exists but only contains the network we intend to replace anyway, also save firewall settings after wifi join

modules/admin-full: switch back to alias() for / -> /admin/; chained firstchild() seems to be problematic yet

	- move crontab to system menu
	- delete now empty services dispatcher
	- move service menu declaration into index

modules/admin-full: make software page tabbed, show available list broken down by letters; greatly speeds up loading time

admin-status/overview: Use MAC-Address in table header of associated stations instead of BSSID (#312)

modules/admin-full: remove PVID support, its not really useful and confusing, fix parsing of port count and cpu port, expose hardware name