change config['log_path'] on the fly

OK. Narf, does this apply to "log_path" alone or all CI config params? 

CI gave room for config params modification using

PHP Code:

$this->config->set_item("index","new_value") 


obviously because those config params can be modified. Also, there is no documentation specifying any config params which can not be changed. This is why i am of the opinion that it should/could be possible.