Origin for each line in counter.upstream.conf.sample from check-in b33171b487:

b33171b487 2018-06-01 arcade@b1t.na: upstream counter {
b33171b487 2018-06-01 arcade@b1t.na: 	postgres_server 127.0.0.1 dbname=db user=user password=pass;
b33171b487 2018-06-01 arcade@b1t.na: 	postgres_keepalive max=4 mode=multi overflow=ignore;
b33171b487 2018-06-01 arcade@b1t.na: }