config dhcp
	option zz 'lan'
config net
    option a "string"
config dhcp 'lan'
	option b "string"
	list read '*'
	list read 'ok'
	list write '*'
	list read 'a'
config dhcp 'wan'
	option b "string"
	list read '*'
	list read 'ok'
	list write '*'
	list read 'a'
config dhcp
	option c "another"
config dhcp
	option c "another_2"