- update to 0.9.0:
* Added the `spnego.ContextReq.dce_style` flag to enable DCE
authentication mode
* The value for `spnego.iov.BufferType.sign_only` on SSPI has
changed from representing `SECBUFFER_MECHLIST` to
`SECBUFFER_READONLY_WITH_CHECKSUM`
* Added the IOV buffer type
`spnego.iov.BufferType.data_readonly`
* Added limited support for `wrap_iov` and `unwrap_iov` in the
Python NTLM context provider.
* Added the `query_message_sizes()` function on a context to
retrieve the important message sizes
Currently this only contains the size of the message
`header`, also known as the signature or security trailer
* Added the `spnego.ContextReq.no_integrity` flag to disable
integrity/confidentiality on Kerberos/Negotiate contexts
* Added optional kwargs to `step()` on a security context
`channel_bindings`
* Added support for decoding the following TLS payloads with
`python -m spnego --token ...`
* Client Hello
* Server Hello
* Certificate
* Server Key Exchange
* Client Key Exchange
* Certificate Request
* Added the `new_context()` method on the context proxies to
provide an easy and efficient way to re-use the context
credentials and options for a new context
* Removed use of `gssntlmssp` to simplify codebase and ensure a