(Connection::username_valid): Mention that this field is used to

determine if async messages are sent.

src/server/connections.h

 /*
- * $Id: connections.h,v 0.24 1996/07/28 13:37:57 ceder Exp $
+ * $Id: connections.h,v 0.25 1996/07/28 15:17:36 ceder Exp $
  * Copyright (C) 1991, 1992, 1993, 1994, 1995  Lysator Academic Computer Association.
  *
  * This file is part of the LysKOM server.
@@ -23,7 +23,7 @@
  * Please mail bug reports to bug-lyskom@lysator.liu.se. 
  */
 /*
- * $Id: connections.h,v 0.24 1996/07/28 13:37:57 ceder Exp $
+ * $Id: connections.h,v 0.25 1996/07/28 15:17:36 ceder Exp $
  *
   * connections.h -- The top level of the communication packet.
   *
@@ -60,7 +60,10 @@ typedef struct connection {
     String              client_name;     /* See doc/clients.assigned */
     String              client_version;
     Bool		invisible; 	 /* Is this session invisible? */
-    Bool		username_valid;	 /* Set once username is set. */
+    Bool		username_valid;	 /* Set once username is set.
+					    Under protocol A, no async
+					    messages are sent until
+					    this bit is set. */
     Bool                want_async[ay_dummy_last]; /* Async messages to get */
     
     /* The following are used by server/connections.c */