(Vcharset_ideograph_daikanwa): New variable.

(Vcharset_ideograph_daikanwa): New variable.
(Vcharset_hiragana_jisx0208): Deleted.
(Vcharset_katakana_jisx0208): Deleted.
(Qideograph_daikanwa): New variable.
(Qhiragana_jisx0208): Deleted.
(Qkatakana_jisx0208): Deleted.
(split_builtin_char): Split `ideograph-daikanwa'.
(Fsplit_char): New implementation for UTF-2000.
(syms_of_mule_charset): Add new symbol `ideograph-daikanwa'; delete
symbol `hiragana-jisx0208' and `katakana-jisx0208'.
(complex_vars_of_mule_charset): Add new coded-charset
`ideograph-daikanwa'; delete coded-charset `hiragana-jisx0208' and
`katakana-jisx0208'.