be19cdf31c8665f149f34617cab7104832e3a9d1
The choice what errors to ignore is left to the caller, and the caller is changed to ignore all errors. On error, previously read data is kept. So if e.g. an oom error happens, we will continue to return slightly stale data instead of pretending we have no entries for the given address. I think that's better, for example when /etc/hosts contains some important overrides that external DNS should not be queried for.
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