title: Decompile Luac files - dealing with encryption
body: <p>I've read from other questions on this site that luac files can be decompiled if you know the lua version. I've also read that the lua version is stored in the 5th byte of the luac file (the header). However here's the first few bytes of a luac file I have:</p>
  
  <pre><code>1b 4c 4a 01 02 d1 01 00
  </code></pre>
  
  <p>To my eye the 5th byte is 02. Which suggests I'm dealing with a lua 0.2 file - I don't believe there is such a version!</p>
  
  <p>The above issue has made me thing the file is possibly encrypted - I know nothing of lua encryption... literally nothing. Is it reasonably possible to decrypt and decompile the lua file in question? How might I start this process?</p>