Add some missing reserved TLDs

[hfz1337]

It looks like the following TLDs (commonly used in local network hosts) are not in the list of TLDs (.tld_set_snapshot):

.local
.localdomain
.domain
.lan
.home
.corp

Edit: I just noticed the extra_suffixes kwarg in the TLDExtract class, so this may not be needed actually.
Feel free to close this issue if you think the above TLDs shouldn't be considered by default.

[john-kurkowski]

I'll think about this.

On one hand, this library doesn't define any suffixes, it leaves those to the Public Suffix List, emphasis on "public." See this FAQ entry. The FAQ also mentions your extra_suffixes workaround, right.

On the other hand, the Public Suffix List is tracking a similar issue in publicsuffix/list#1681. The upstream list may one day include the recommended private TLDs. In the context of this library, the recommended private TLDs do appear separate and reserved, like they could be treated differently, to distinguish them from an arbitrary private domain like www.localhost.asdfghjkl.

[jvanasco]

Just saw this, and wanted to offer the following: There are several special use / reserved domains that are defined by RFCs.

In addition to the above:

• .invalid
• .localhost
• .test
• .internal
• .alt

See (which notes the relevant RFCs)

• https://en.wikipedia.org/wiki/Top-level_domain#Reserved_domains
• https://en.wikipedia.org/wiki/Special-use_domain_name

It would be nice if this package detected them, and noted they were reserved.

[pcoccoli]

This would be useful to me, as would having an is_reserved field in ExtractResult (similar to https://docs.python.org/3/library/ipaddress.html#ipaddress.IPv4Address.is_reserved).