Fix issue 173 relating to zombie connections from Socket #176

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rnbrady wants to merge 3 commits intoBitcoin-com:masterfrom rnbrady:issue-173

+300-33

Commits on Feb 10, 2020

Add steps to reproduce issue Bitcoin-com#173 showing redundant connections.
rnbrady
committed

Commits on Feb 13, 2020

Add and improve tests for issue Bitcoin-com#173 .
rnbrady
committed
Fix issue Bitcoin-com#173 relating to redundant / zombie Socket connections.
rnbrady
committed