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doc: clarify what dns.setResolvers() affects

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It does not affect dns.lookup().

PR-URL: https://github.com/nodejs/node/pull/25570
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
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Sam Roberts 2019-01-18 10:04:17 -08:00
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doc/api/dns.md
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@ -571,6 +571,10 @@ An error will be thrown if an invalid address is provided.
The `dns.setServers()` method must not be called while a DNS query is in
progress.
The [`dns.setServers()`][] method affects only [`dns.resolve()`][],
[`dns.resolve*()`][] and [`dns.reverse()`][] (and specifically *not*
[`dns.lookup()`][]).
Note that this method works much like
[resolve.conf](http://man7.org/linux/man-pages/man5/resolv.conf.5.html).
That is, if attempting to resolve with the first server provided results in a