host_normalize          Normalize hosts to canonical comparison form
is_idn                  Test if domain contains internationalized
                        characters
is_punycode             Test if string is punycode encoded
normalization_profile_info
                        Canonical-host normalization profile identity
print.punycoder_validation
                        Print method for punycoder validation results
puny_decode             Decode ASCII Punycode to Unicode domain labels
                        (low-level)
puny_encode             Encode Unicode domain labels to ASCII Punycode
                        (low-level)
punycoder-package       Unicode and Punycode Domain Name Processing
validate_domain         Comprehensive domain name validation
