This tool attempts to make TCP+TLS+DRPC and QUIC+DRPC connections to a
specified IP:port. If successful with either, it shows the node ID of
the opposite end of the connection.
This should be useful for SNOs who want to check that their packet
forwarding is working or that their node is listening for both
connection types.
Change-Id: I935dff037dd7f1106941a35567f6445230259d1a
