Can't use deleg creds with SPNEGO (test_context)

It isn't possible to use non-default credentials to init a context with
a mechanism for which the credential doesn't have an element.  That's
exactly what was happening here.  The code was left commented out to
describe how one might use SPNEGO with delegated credentials:
store them with gss_store_cred(), then acquire them back.

lib/gssapi/test_context.c

@@ -978,6 +978,13 @@ main(int argc, char **argv)
 
 	gss_release_cred(&min_stat, &cred2);
 
+#if 0
+        /*
+         * XXX We can't do this.  Delegated credentials only work with
+         * the actual_mech.  We could gss_store_cred the delegated
+         * credentials *then* gss_add/acquire_cred() with SPNEGO, then
+         * we could try loop() with those credentials.
+         */
 	/* try again using SPNEGO */
 	if (verbose_flag)
 	    printf("checking spnego on delegated cred\n");
@@ -988,6 +995,7 @@ main(int argc, char **argv)
 	gss_delete_sec_context(&min_stat, &sctx, NULL);
 
 	gss_release_cred(&min_stat, &cred2);
+#endif
 
 	/* check export/import */
 	if (ei_flag) {
@@ -1016,6 +1024,8 @@ main(int argc, char **argv)
 	    gss_delete_sec_context(&min_stat, &cctx, NULL);
 	    gss_delete_sec_context(&min_stat, &sctx, NULL);
 
+#if 0
+            /* XXX See above */
 	    /* try again using SPNEGO */
 	    if (verbose_flag)
 		printf("checking SPNEGO on export/imported cred\n");
@@ -1026,6 +1036,7 @@ main(int argc, char **argv)
 
 	    gss_delete_sec_context(&min_stat, &cctx, NULL);
 	    gss_delete_sec_context(&min_stat, &sctx, NULL);
+#endif
 
 	    gss_release_cred(&min_stat, &cred2);