esp32/modsocket: When resolving IP addr handle the case of host=''.
esp32/modsocket: When resolving IP addr handle the case of host=''.

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