Update information on tradelane_attack and tradelane_down values

docs/ini-editing/typed-inis/system.md

@@ -327,8 +327,8 @@ music = STRING ;optional
 | attack_ids             | Used in population zones to determine which tradelanes to attack. Uses `lane_id` values seperated by commas.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
 | mission_type           | Used by mission vignette zones. Valid options are lawful and unlawful.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
 | lane_id                | Used by tradelane zones and referenced by `attack_id`.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
-| tradelane_attack       | Used by patrol paths. May determine the percentage of time a patrol engages a tradelane.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
-| tradelane_down         | Used for tradelane zones. Determines the percentage of time the tradelane will be offline. This requires appropriate `lane_id` and population zones with `attack_ids` defined.                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
+| tradelane_attack       | Used by patrol paths. May determine the percentage of time a patrol engages a tradelane. There appears to be a set cooldown of several minutes for interceptions, and the interception will occur near the point where the patrol zone intersects with the tradelane zone if this value is set. Seems to function even when `tradelane_down` and `attack_ids` are not set.                                                                                                                                                                                                                                                                               |
+| tradelane_down         | Possibly unused. Testing is required to see if this works in conjuction with `lane_id` and `attack_ids`.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
 | sort                   | Unused. Sorting is done by the order of the `[Zone]` entries in the file.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
 | vignette_type          | Used for mission vignette zones. Options are `field`, `exclusion` and `open`.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
 | toughness              | Unused. Toughness of NPCs is defined only by the `encounter` parameter.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |