[Battlemesh] Example how to setup a static route in /etc/config/network

[Henning Rogge]

config 'route'
       option 'interface' 'management'
       option 'target' '0.0.0.0'
       option 'netmask' '0.0.0.0'
       option 'gateway' '192.168.1.1'
       option 'source' '192.168.1.2'