Correct SLAAC config for meshradio

[stephen304]

config dhcp 'lan'
        option interface 'lan'
        option ignore '1'
        option ra_slaac '1'
        list ra_flags 'managed-config'
        list ra_flags 'other-config'

config odhcpd 'odhcpd'
        option maindhcp '0'
        option leasefile '/tmp/hosts/odhcpd'
        option leasetrigger '/usr/sbin/odhcpd-update'
        option loglevel '4'

We should apply something like this to all meshradio profiles