Make connect/test1 independent of localhost IPv6.

Noah Misch <noah@leadboat.com>

Commit: 3c80348d24914d9ddf65d56d2c343a7f2b820705
Author: Noah Misch <noah@leadboat.com>
Date: 2017-11-11T22:33:25Z
Releases: 9.6.7
Make connect/test1 independent of localhost IPv6.

Since commit 868898739a8da9ab74c105b8349b7b5c711f265a, it has assumed
"localhost" resolves to both ::1 and 127.0.0.1.  We gain nothing from
that assumption, and it does not hold in a default installation of Red
Hat Enterprise Linux 5.  Back-patch to 9.3 (all supported versions).

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