System task initialization moved to main()

- the system task initialization code does not really need to be part
  of the system task process. An earlier initialization in kernel is
  cleaner as it does not only initialize the syscalls but also irq
  hooks etc.

kernel/system.c

@@ -75,10 +75,6 @@ PUBLIC void sys_task()
   int who_p;
   endpoint_t who_e;
 
-  /* Initialize the system task. */
-  initialize();
-
-
   while (TRUE) {
       struct proc *restarting;
 
@@ -146,7 +142,7 @@ PUBLIC void sys_task()
 /*===========================================================================*
  *				initialize				     *
  *===========================================================================*/
-PRIVATE void initialize(void)
+PUBLIC void system_init(void)
 {
   register struct priv *sp;
   int i;