Update an imperfect error message.

sql/sql_servers.cc:
  It's not a fatal error if we can not open mysql.servers table
  (the start up process continues).

sql/sql_servers.cc

@@ -208,7 +208,7 @@ my_bool servers_reload(THD *thd)
 
   if (simple_open_n_lock_tables(thd, tables))
   {
-    sql_print_error("Fatal error: Can't open and lock privilege tables: %s",
+    sql_print_error("Can't open and lock privilege tables: %s",
 		    thd->net.last_error);
     goto end;
   }