unicode support in domain names

[tsar.peter at gmail.com]

Clueless sweeping comments does not improve your  credability.

For us that cares about interoperability and standards :
The question was " support of unicode charsets in domain names" , and
when it comes
to what people usually mean that is "A" records. Hostnames as expressed
in
DNS are restricted to even less then USASCII. ( a-z  '-' 0-9   '.' )
case insensitive.
rfc1035 2.3.1 will describe why.

Using "national character sets" in domain names is covered on
application
level, this is described in IDN RFC3490 might be a starting point.

That said, some DNS types accepts 8-bit transparant labels and data.
Still that 
doen not mean that a FQDN hostname may uses full unicode.