idna_to_ascii
Convert string name from UTF-8 to idna representation (8z punycode).
name
If an error occurs, an exception is thrown.
The efun is available only if the system supports libidn - in that case __IDNA__ is defined.
__IDNA__
convert_charset(E), idna_to_ascii(E), idna_stringprep(E)
convert_charset
idna_stringprep