Binary package “ruby-public-suffix” in ubuntu lunar

Domain name parser based on the Public Suffix List

 PublicSuffix can parse and decompose a domain name into top level domain,
 domain and subdomains.
 .
 The Public Suffix List is a catalog of certain Internet domain names.
 The term is also known by the form effective top-level domain (eTLD).
 This list is used for the security and privacy policies of web application.