Binary package “idn” in ubuntu xenial

Command line and Emacs interface to GNU Libidn

 GNU Libidn is a fully documented implementation of the Stringprep,
 Punycode and IDNA specifications. Libidn's purpose is to encode and
 decode internationalized domain names. The Nameprep, XMPP, SASLprep,
 and iSCSI profiles are supported.
 .
 This package contains the idn command-line tool and its Emacs lisp
 interface.