uTP logging weirdness

[kdeme]

There is some strange behaviour going on with the chronicle loggings in uTP:

• Following exports should not be needed: https://github.com/status-im/nim-eth/blob/master/eth/utp/utp_discv5_protocol.nim#L16 & https://github.com/status-im/nim-eth/blob/master/eth/utp/utp_socket.nim#L21
• the utp_discv5_protocol logscope topic seems to appear on most logs