net: don't assume that NOFILE rlimit fits in an int
No test because a test requires a system on which we can set RLIMIT_NOFILE
to RLIM_INFINITY, which we normally can't.
Fixes #59242
Change-Id: I8fc30e4206bb2be46369b5342360de556ce75a96
Reviewed-on: https://go-review.googlesource.com/c/go/+/479436 Reviewed-by: Ian Lance Taylor <iant@google.com>
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Run-TryBot: Ian Lance Taylor <iant@google.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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