Fix server name

Syntax was wrong, and don't try to include a realm for now, just
run everything in the test realm.

Change-Id: I5e6d69589ae3432fee704d27dbf952897475a9fd
Print status from gss_init_sec_context

So we have some idea whether it's working.

Change-Id: I76a884335527f20d2c210e0e6ad830f2b34d829a
Factor out fill_start_params

It's a sizable chunk of code, with error checking, and does not need
to clutter up main.

Change-Id: I37d551ed97265a3ab4bcb0af366bf50e64d87bd6
Attempt to make rxgkd do GSSAPI, too

Actually call gss_accept_sec_context, read in the input token,
pass out the output token, etc.

Change-Id: I385e817f8d4bdfa080905480f517e55ca513ba8e
Debugging stuff

Change-Id: I7585b60c7f21835436d2cafee42705468b25fe90
Debugging prints

Change-Id: I6f62ecb11ac6ce010d22770f8b59e05b908fbc86
Debugging checkpoint

Change-Id: I3e47fecca8f5b197536f50ab8b306031601a2394