Should prevent other bugs like 26117.

Previously, we used the AF_UNSPEC check to represent valid connected cell
data as a result of the lack of return. This was incorrect.

Fixes bug 26072; bugfix on 0.2.4.7-alpha.

Having one function implemented in terms of the other should keep
them from diverging.

follow-up on #25852

i don't know if whitespace is ok to have before preprocessing
directives on all platforms, but anyway we almost never have it,
so now things are more uniform.

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