Only set content-type if not already determined
Fixed memory leaks and file handle leaks.
Simplified config example
Merge pull request #2 from demellj/master

Fixed memory and file handle leaks and a content-type bug.
Revert "Fix int/unsigned comparison"

This reverts commit acb02a6f7e19b49197b4806f30d5792b07963da3.
Revert "Revert "Fix in ngx_http_unzip_handler""

This reverts commit 4a197aee2689a90d927ffa7828736906fe790f99.
Merge remote-tracking branch 'upstream/master'