title: Force gzip to decompress despite CRC error
body: <p>I think there's a way to do this but I'm not sure how? Basically, I was writing a compression program that resulted in a crc error when I tried to unzip the compressed data. Normally this means that the decompressor actually recognized my data as being in the right format and decompressed it, but when it compared the result to the expected length as indicated by the CRC, they weren't the same. </p>
  
  <p>However, for comparison reasons, I actually do want to see the output to see if it's just a concatenation issue (which should be relatively obvious if the decompressed output isn't gibberish but just in the wrong order). </p>