panic() cleanup.

this change
   - makes panic() variadic, doing full printf() formatting -
     no more NO_NUM, and no more separate printf() statements
     needed to print extra info (or something in hex) before panicing
   - unifies panic() - same panic() name and usage for everyone -
     vm, kernel and rest have different names/syntax currently
     in order to implement their own luxuries, but no longer
   - throws out the 1st argument, to make source less noisy.
     the panic() in syslib retrieves the server name from the kernel
     so it should be clear enough who is panicing; e.g.
         panic("sigaction failed: %d", errno);
     looks like:
         at_wini(73130): panic: sigaction failed: 0
         syslib:panic.c: stacktrace: 0x74dc 0x2025 0x100a
   - throws out report() - printf() is more convenient and powerful
   - harmonizes/fixes the use of panic() - there were a few places
     that used printf-style formatting (didn't work) and newlines
     (messes up the formatting) in panic()
   - throws out a few per-server panic() functions
   - cleans up a tie-in of tty with panic()

merging printf() and panic() statements to be done incrementally.

servers/ds/main.c

@@ -52,7 +52,7 @@ PUBLIC int main(int argc, char **argv)
 			      sig_handler();
 			      break;
 		      default:
-			      report("DS","warning, got illegal notify from:",
+			      printf("DS: warning, got illegal notify from: %d\n",
 					     			 m.m_source);
 			      result = EINVAL;
 			      goto send_reply;
@@ -87,7 +87,7 @@ PUBLIC int main(int argc, char **argv)
 	  result = do_getsysinfo(&m);
 	  break;
       default: 
-          report("DS","warning, got illegal request from:", m.m_source);
+          printf("DS: warning, got illegal request from %d\n", m.m_source);
           result = EINVAL;
       }
 
@@ -153,7 +153,7 @@ message *m_ptr;				/* message buffer */
     int status = 0;
     status = sef_receive(ANY, m_ptr);   /* this blocks until message arrives */
     if (OK != status)
-        panic("DS","failed to receive message!", status);
+        panic("failed to receive message!: %d", status);
     who_e = m_ptr->m_source;        /* message arrived! set sender */
     callnr = m_ptr->m_type;       /* set function call number */
 }

servers/ds/store.c

@@ -266,12 +266,12 @@ PUBLIC int sef_cb_init_fresh(int type, sef_init_info_t *info)
 	/* Map all the services in the boot image. */
 	if((r = sys_safecopyfrom(RS_PROC_NR, info->rproctab_gid, 0,
 		(vir_bytes) rprocpub, sizeof(rprocpub), S)) != OK) {
-		panic("DS", "sys_safecopyfrom failed", r);
+		panic("sys_safecopyfrom failed: %d", r);
 	}
 	for(i=0;i < NR_BOOT_PROCS;i++) {
 		if(rprocpub[i].in_use) {
 			if((r = map_service(&rprocpub[i])) != OK) {
-				panic("DS", "unable to map service", r);
+				panic("unable to map service: %d", r);
 			}
 		}
 	}