UTF-5 encoding support(for compatibiliy for xyzzy)

[Takehiko NOZAKI]

specification is here: http://tools.ietf.org/html/draft-jseng-utf5-01

i know this is obsolete I-D and Internationalized Domain Name now uses Punycode. but unfortunately xyzzy editor supports read/write UTF-5 document.

i believe iconv should support all encoding that supported by text editors that ever exists. so citrus iconv should do.

[Takehiko NOZAKI]

done, see <<cset 7c33ee90063f93c424dede796115832fb872886b>>.