This adds support for query strings in which a sequence field of a `Deserialize` / `Serialize` struct is (de)serialized as `field=val1&field=val2&field=val3`, instead of the more common `field[]=val1&field[]=val2&field[]=val3` syntax.
This adds support for query strings in which a sequence field of a `Deserialize` / `Serialize` struct is (de)serialized as `field=val1&field=val2&field=val3`, instead of the more common `field[]=val1&field[]=val2&field[]=val3` syntax.