PGSSAPI lets you selectively plug external GSSAPI
security libraries into applications without
having to recompile the application each time. It
decouples applications from particular GSSAPI
implementations and allows you to combine
implementations. It works by wrapping and
dispatching standard GSS calls to libraries that
you would otherwise directly link against. It
dynamically loads GSS libraries, selecting which
one to dispatch to by configuration file or by
examining the standard header of GSS network tokens.