Bitcloud.c: Update nodes table from one node to another

[gnostication]

◦ Test1: compare “nodes” table of one node with another (output/log results)
◦ Test2: update one node with other node's “nodes” table content (only new records) – DB should have results and be available for investigation
◦ Test3: have three nodes in serial connect to each other at different times, with end nodes discovering each other (e.g., N1 → N2 ← N3, N1 and N3 connect to N2 and discover each other through N2)