title: node querystring not defined in script only
body: <p>I can use querystring in node 4.2.6 from a script, but I can from a node prompt.  Here's some proof.</p>
  
  <p>I have the following script:</p>
  
  <pre><code>$ cat test.js
  console.log(process.versions)
  console.log(querystring)
  </code></pre>
  
  <p>And I get an error when I run it:</p>
  
  <pre><code>$ node test.js
  { http_parser: '2.5.0',
    node: '4.2.6',
    v8: '4.5.103.35',
    uv: '1.8.0',
    zlib: '1.2.8',
    ares: '1.10.1-DEV',
    icu: '56.1',
    modules: '46',
    openssl: '1.0.2e' }
  /path/to/file/test.js:2
  console.log(querystring)
              ^
  ReferenceError: querystring is not defined
      at Object.&lt;anonymous&gt; (/path/to/file/test.js:2:13)
      at Module._compile (module.js:410:26)
      at Object.Module._extensions..js (module.js:417:10)
      at Module.load (module.js:344:32)
      at Function.Module._load (module.js:301:12)
      at Function.Module.runMain (module.js:442:10)
      at startup (node.js:136:18)
      at node.js:966:3
  </code></pre>
  
  <p>But if I go into node on the command line, I don't get the error.</p>
  
  <pre><code>$ node
  &gt; console.log(process.versions)
  { http_parser: '2.5.0',
    node: '4.2.6',
    v8: '4.5.103.35',
    uv: '1.8.0',
    zlib: '1.2.8',
    ares: '1.10.1-DEV',
    icu: '56.1',
    modules: '46',
    openssl: '1.0.2e' }
  undefined
  &gt; console.log(querystring)
  { unescapeBuffer: [Function],
    unescape: [Function],
    escape: [Function],
    encode: [Function],
    stringify: [Function],
    decode: [Function],
    parse: [Function] }
  undefined
  </code></pre>
  
  <p>The console.log() is just for proof--I can't use querystring at all in a script. What could be wrong?</p>