domain mode to include only unique domain name

[ehsandeep]

in domain mode, tldfinder reverse lookup for related domains and expected output to have list of related domains, some of sources also includes subdomains which we need to filter out from output and ensure only unique root domains are being included in output.

tldfinder -d google.com -dm domain -s whoisxmlapi -v

+ [whoisxmlapi] blogspot.be
- [whoisxmlapi] philosemitismeblog.blogspot.be
- [whoisxmlapi] philaquaculture.blogspot.be
- [whoisxmlapi] kunstenaarsboeken.blogspot.be
- [whoisxmlapi] cashbackpowa.blogspot.be
- [whoisxmlapi] letsmisbehaveprecodefilmtribute.blogspot.be
- [whoisxmlapi] costaricainsights.blogspot.be
  [whoisxmlapi] snacks.dev
  [whoisxmlapi] scaner.app
  [whoisxmlapi] vegastech.dev
  [whoisxmlapi] thegaursonstimes.page

we need to make sure this change is applicable for other sources supporting in domain mode.

• whoisxmlapi
• whoxy
• dnsrepo