Fix spelling error in logging section of configuration doc.
| | %t | date_time (with millisecond resolution) | date |
| H | %tr | date_time of HTTP request | date |
| H | %trg | gmt_date_time of start of HTTP request | date |
- | H | %trl | locla_date_time of start of HTTP request | date |
+ | H | %trl | local_date_time of start of HTTP request | date |
| | %ts | termination_state | string |
| H | %tsc | termination_state with cookie status | string |
+---+------+-----------------------------------------------+-------------+