Function once

test/parallel/test-http-max-http-headers.js:16–24

(cb)

// Verify that we cannot receive more than 16KB of headers.

function once(cb) {
  let called = false;
  return () => {
    if (!called) {
      called = true;
      cb();
    }
  };
}

function finished(client, callback) {
  ['abort', 'error', 'end'].forEach((e) => {