Ancestry servers have been hit by a distributed denial-of-service (DDoS) attack that started on Monday, putting on hold the research of the website visitors and the users of the applications relying on the services. The company announced that Ancestry websites are still not 100% functional and that some services still need to be restored completely. Among the affected websites is FindAGrave.com, that offers access to 116 million grave records and was acquired by Ancestry.com in September 201…