LPS-38618 Handle Don't set cookie domain explicitly if  SESSION_COOKIE_USE_FULL_HOSTNAME is enabled

Hi Julio,

I really don't know to whom I should send this to. Minhchau is in the CookieKeys class as an author, however, he's not on our review chain.

I chose you as you're familiar with this issue already, but please, feel free to pass or let me know who else I should send to.

Thank you,
Zsigmond