Allow docs.trafodion.org to serve up other file formats

Allow docs.trafodion.org to serve up other file formats such as
.tar.gz, .tgz, and .zip files

Change-Id: I9659214fcb70b62018d1f8238093d28d8aeb799f
Closes-Bug: 1399031
Merge "Allow docs.trafodion.org to serve up other file formats"