feature: add a few helpers fn (is...)

fix: print unprintable characters no longer occurs

src/kernel.c

@@ -29,5 +29,8 @@ void kernel_main(void)
 	init_idt();
 	init_memory();
 	load_drivers();
+	kprintf("I see no way to confuse an array of 256 seg:off pairs with a "
+	        "complex 8*unknown quantity -byte descriptor table. -- Troy "
+	        "Martin 03:50, 22 March 2009 (UTC)\n");
 	shell_init();
 }