NAT syntax is inconsistent and in my opinion error prone.
`set nat destination rule 1 source port` supports setting a service name as port, e.g. http for port 80, `set nat destination rule 1 translation port` does not support this notation.
* [ ] write migration script transforming the service name into a real port and drop that CLI capability
* [ ] write migration script removing enable/disable from `set nat destination rule 1 log` node and make it valueless