Merge of r3972, r3973, r3974: Cache fixes: *) do not close connection if cache file is too small: replace it with valid one *) rename ngx_http_file_cache_manager_sleep() to ngx_http_file_cache_loader_sleep() and do not use it all in cache manager: this is a vestige of the times when cache manager loaded cache *) set correct configuration file values while adding path