Set the default ICMP data payload size to 1 in dpinger probes.
This fixes the dropping of the ICMP probes in some broken routers/ISPs.
There is no increase of the packet size on wire as probes are smaller than 60 bytes (all probe packets are padded).
It is possible to restore the old behaviour by setting the data payload back to '0'.
(cherry picked from commit ea0d5cbe0a49ff85ab592aadaafc8e806fd1297e)
Set the default ICMP data payload size to 1 in dpinger probes.
(cherry picked from commit ea0d5cbe0a49ff85ab592aadaafc8e806fd1297e)