node 10.2 DiffusionError ExceptionInHandler crash

[gufmar]

[coot]

Thanks @gufmar, we'll investigate it ASAP.

[coot]

Fixed by:

• coot/versions-0.19 #5061 for the future cardano-node-10.2.1; coot/versions #5062 in main;
• Rethrow policy for 0.19 release #5076 for the future cardano-node-10.2.1; diffusion: IOError rethrow policy #5067 in main.