Handle ZMQError "Address already in use"#30

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pnuu wants to merge 8 commits intopytroll:mainfrom

pnuu:bugfix-zmqerror

Commits on Oct 29, 2020

Commits on Oct 30, 2020

Make bind retries configurable via env variables
pnuu
committed

Commits on Nov 3, 2020

Commits on Nov 27, 2020

Add tests, fix number of retries
pnuu
committed