Fix not necessary url_escape in cookie

[norguhtar]

It already fixed in v1. but this bug still exist in v2. Can you fixed this?

#82

[olegrok]

Hi!

But seems your patch (#82) is already applied - https://github.com/tarantool/http/blob/master/http/router/response.lua#L43

[norguhtar]

It not applied. See changes on 282 line. In your code you use utils.uri_escape(value) before in 41 line
accf960