Return errors instead of panicking in router

[cwgoes]

Instead, panic in the app.

[crodriguezvega]

So this is about turning the panics in this file into errors that are returned?

[colin-axner]

This applies to all of 05-port, not just the router file in types

[DimitrisJim]

Adding icebox for time being, see justification in pr comment by Damian #5401 (comment)