esp32/modnetwork: Simplify event_handler messages.
esp32/modnetwork: Simplify event_handler messages.

Only print the event id if it's an unknown/unhandled event.

SHA2017-badge/micropython-esp32,micropython/micropython-esp32,micropython/micropython-esp32,SHA2017-badge/micropython-esp32,MrSurly/micropython-esp32,micropython/micropython-esp32,SHA2017-badge/micropython-esp32,MrSurly/micropython-esp32,SHA2017-badge/micropython-esp32,Peetz0r/micropython-esp32,Peetz0r/micropython-esp32,Peetz0r/micropython-esp32,Peetz0r/micropython-esp32,micropython/micropython-esp32,MrSurly/micropython-esp32,MrSurly/micropython-esp32,SHA2017-badge/micropython-esp32,micropython/micropython-esp32,MrSurly/micropython-esp32,Peetz0r/micropython-esp32