http: Add cookie parser

* Add parser of cookies from 'Set-Cookie' header.
* All cookies are stored in response object in cookie table.
* The format of each table element is following:
resp[key] = {value, {option, ...}},
where key, value is cookie key, value
options are array of strings, set-cookie header options,
e.g. HttpOnly, Expires=<date>.

Closes #2801