FQDN Validation Library

The `fqdn` Python library, currently at version 1.5.1, provides RFC-compliant validation and manipulation of Fully Qualified Domain Names (FQDNs). Its primary purpose is to ensure that domain names adhere to Internet Engineering Task Force specifications like RFC 1123, making them suitable for traditional internet hostname usage. This is often a stricter subset of what modern web browsers accept. The library typically sees updates in response to specification clarifications or bug fixes, though major releases are infrequent.