This converts an associated list to a parameter string, for use in /client/proc/Topic(), among other places.

var/my_list = list("some_key" = 121, "some_other_key" = "some other value")

world.log << list2params(my_list) // some_key=121&some_other_key=some+other+value

Characters that have a special meaning in a parameter string, such as = and &, will be percent-encoded.