module Default: PROFILE 
The default profile for 
Netmech_spnego_http: Use 
spnego_trans_id for
    the https transport, and reject any unencrypted transport (empty list).
    Delegations are off.
 
val acceptable_transports_http : Nethttp.transport_layer_id list
Which transport IDs are acceptable for authenticated requests
          on unencrypted connections.
          For new requests, the first ID of this list is the preferred ID.
val acceptable_transports_https : Nethttp.transport_layer_id list
Which transport IDs are acceptable for authenticated requests
          on HTTPS-secured connections.
          For new requests, the first ID of this list is the preferred ID.
val enable_delegation : bool
Whether to allow delegation of the credentials to the server.
          Enabling this means that the server can impersonate the local
          identity, so use with care. Also, getting tokens carrying the
          delegation information can be time-consuming (and the HTTP
          client will simply block while doing so).
val deleg_credential : exn option
If you already have a credential, you can set this value to
          the exception Credential c (from the GSSAPI provider).