The reference to this is <https://sourceware.org/glibc/wiki/NameResolver>,
which mentions:
"From the perspective of the application that calls getaddrinfo() it
perhaps doesn't matter that much since EAI_FAIL, EAI_NONAME and
EAI_NODATA are all permanent failure codes and the causes are all
permanent failures in the sense that there is no point in retrying
later."
This should cover more early-boot situations.
While we're at it, we clean up the logic a bit so that we don't have a
retry message on the final non-retrying attempt. We also peer into errno
when receiving EAI_SYSTEM, to report to the user what actually happened.
Also, fix the quoting back tick front tick mess.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
