When trying to use `Content-Encoding` support for request bodies, gzip works as expected but deflate does not, the request payload is unexpected.

Reproducing project: https://github.com/flozano/undertow-compression-issue/

Edit:

It seems the issue is that the RFC specifies zlib wrapping + deflate compression, but there are implementations that just send deflate compression without zlib wrapping.

Implementation in Undertow uses an Inflater with `nowrap=true`, and it seems to work only for payloads that are not wrapped with zlib (see reproducing project).

There is a suggestion in stackoverflow as to use the first few bytes to decide if wrapping was used or not.