Ian Barwick 668b2c9b59 repmgrd: use PQping() as a first test of whether an upstream node is available ...

It's possible the upstream node may be temporarily not accepting connections
but is still running, so we only confirm that connections are not possible once
PQping() reports a negative result.

This feature has been adapted from repmgr4.

2019-02-22 14:04:37 +09:00

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