Bug 677923 - Add soup_cookie_jar_set_cookie_with_first_party() alternative that takes...

Bug 677923 - Add soup_cookie_jar_set_cookie_with_first_party() alternative that takes a SoupCookie in argument

Currently, the only way to add a cookie while checking first_party is to use
soup_cookie_jar_set_cookie_with_first_party(). However, this function takes an
unparsed cookie in argument.

In the event the client has already parsed the cookie (e.g. to do some
pre-processing), it would be useful to have an alternative to
soup_cookie_jar_set_cookie_with_first_party() which takes a parsed SoupCookie
in argument. This would be more efficient.