Revert "net: remove usage of require('util')"
This reverts commit e112fb4c. This commit broke parallel/test-net-access-byteswritten.
Refs: https://github.com/nodejs/node/pull/26807#issuecomment-476016632
Did a bisect and arrived at the same conclusion.
Collaborators, please
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
commit message follows commit guidelines