FEATURE REQUEST: Add support to execute a bash script on IP address change (passing the new IP to the script)

[mytechguyri]

I have a use case where I need to notify a local process of a public ip address change. it would be nice if inadyn had an option to execute a bash script everytime the ip address changes... something in the config like

local-script = \usr\local\sbin\notifyprocess.sh %i

[troglobit]

Pull requests welcome.