Fix console to work on all systems.

console/console.c:
    CONS_REM (remote console) doesn't work on Tru64.  Use CONS_DZ which
    seems to work alright everywhere.
diff --git a/system/alpha/console/console.c b/system/alpha/console/console.c
index 6d00203..e5be19f 100644
--- a/system/alpha/console/console.c
+++ b/system/alpha/console/console.c
@@ -621,7 +621,7 @@
 
     bzero((char *)rpb_ctb, sizeof(struct ctb_tt));
 
-    rpb_ctb->rpb_type = CONS_REM;
+    rpb_ctb->rpb_type = CONS_DZ;
     rpb_ctb->rpb_length = sizeof(ctb_tt) - sizeof(rpb_ctb);
 
     /*