|Hadoop Auth, Java HTTP SPNEGO
|Hadoop Auth is a Java library consisting of a client and a server
|components to enable Kerberos SPNEGO authentication for HTTP.
|The client component is the AuthenticatedURL class.
|The server component is the AuthenticationFilter servlet filter class.
|Authentication mechanisms support is pluggable in both the client and
|the server components via interfaces.
|In addition to Kerberos SPNEGO, Hadoop Auth also supports Pseudo/Simple
|authentication (trusting the value of the query string parameter