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313f56ce2d
Fixes some problems introduced by 6e5f8d489acc: * When reusing conninfo data from the previous connection in \connect, the host address should only be reused if it was specified as hostaddr; if it wasn't, then 'host' is resolved afresh. We were reusing the same IP address, which ignores a possible DNS change as well as any other addresses that the name resolves to than the one that was used in the original connection. * PQhost, PQhostaddr: Don't present user-specified hostaddr when we have an inet_net_ntop-produced equivalent address. The latter has been put in canonical format, which is cleaner (so it produces "127.0.0.1" when given "host=2130706433", for example). * Document the hostaddr-reusing aspect of \connect. * Fix some code comments Author: Fabien Coelho Reported-by: Noah Misch Discussion: https://postgr.es/m/20190527203713.GA58392@gust.leadboat.com