bug#42535: 28.0.50; macOS test failure: echo-server-with-dns

[Robert Pluim]

>>>>> On Tue, 04 Aug 2020 17:26:54 +0200, Lars Ingebrigtsen <larsi@gnus.org> 
>>>>> said:

    Lars> Andreas Schwab <schwab@linux-m68k.org> writes:
    >>> Sure.  So if the first octet is 0 or 127, then we have a resolving
    >>> (system-name)?
    >> 
    >> (system-name) can also resolve to a real IP.

    Lars> Yeah, but we don't really need to run this test on all machines in the
    Lars> world...  that it's disabled for a number is better than it fails for 
a
    Lars> different subset.

'network-lookup-address-info' returns nil if it canʼt resolve the
hostname, and if it happens to return a non-loopback IP, what's wrong
with trying to connect to it? It will be local anyway.

Robert