Add delay or backoff or limit to prevent continual restarts

[dylex]

If for some reason the process immediately exits with non-zero exit code (often due to some failure condition or misconfiguration), it will be immediately restarted in a tight loop. This can load to high load and filling log files when things go wrong. It might be nice to either have some moderate delay before retrying, or a limit on how many time it can be restarted before giving up. Either of these could be configurable. The backoff logic used in ready wait could perhaps be reused somehow?

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