Removed comparison against `DomainName#cookie_domain?` during filtering
of jar cookies. It was redundant considering the later call to
`HTTP::Cookie#valid_for_url?` and prevented valid host-only cookies from
being considered for unqualified hostnames (e.g. "localhost").
RFC 6265 (5.4) does not restrict host-only cookies from being used with
such unqualified names as it does for cookies with the domain attribute
set.
This is a backout of what I've done previously. Expiration check is
better done in extraction where a user can optionally specify a base
date.
Add an internal method delete() to delete an existing cookie.
Fix documents with #each. The uri argument was not made a keyword
argument.
Guarantee that the +uri+ given to AbstractStore#each() is a URI
object.
Make HashStore#each return self as required.
