Why does iconv choose Private Use Area $ echo =C7=CD=C7=B9=C7=AF=C7=EF| perl -MMIME::QuotedPrint -wne 'print decode_qp($_)'| iconv -f big5 -t utf8|uni2ascii -wq 0xF77A 0xF766 0xF75C 0xF79C over U+30D1 KATAKANA LETTER PA, etc.?