CamelImapxAcl: properly check for "end of stream"
CamelImapxAcl: properly check for "end of stream"

* when reading ACL, we get access_id,rights pairs
  without further tokens which would tell whether
  we read the last pair
* we therefore need to check whether the current
  CamelIMAPXStream we read from is at its end

GNOME/evolution-kolab,GNOME/evolution-kolab