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doc/go1.19: mention use of EDNS(0) 

For #51153

Change-Id: I4374c63498b62ba7a08f146eebd034cbd50623f6
Reviewed-on: https://go-review.googlesource.com/c/go/+/389634
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
This commit is contained in:
Ian Lance Taylor 2022-03-02 20:16:55 -08:00
parent 1e122e3894
commit 797e889046
1 changed files with 15 additions and 0 deletions
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15
doc/go1.19.html
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@ -59,3 +59,18 @@ Do not send CLs removing the interior tags from such phrases.
<p>
TODO: complete this section
</p>
<dl id="net"><dt><a href="/pkg/net/">net</a></dt>
<dd>
<p><!-- CL 386016 -->
The pure Go resolver will now use EDNS(0) to include a suggested
maximum reply packet length, permitting reply packets to contain
up to 1232 bytes (the previous maximum was 512).
In the unlikely event that this causes problems with a local DNS
resolver, setting the environment variable
<code>GODEBUG=netdns=cgo</code> to use the cgo-based resolver
should work.
Please report any such problems on <a href="/issue/new">the
issue tracker</a>.
</p>
</dd>
</dl>