(Vchar_attribute_hash_table): New variable.

(Vchar_attribute_hash_table): New variable.
(Vcharacter_attribute_table): Deleted.
(Vcharacter_name_table): Deleted.
(put_char_attribute): Deleted.
(remove_char_attribute): Deleted.
(struct char_attribute_alist_closure): New structure.
(add_char_attribute_alist_mapper): New function.
(Fchar_attribute_alist): Use `Vchar_attribute_hash_table' instead of
`Vcharacter_attribute_table' and `Vcharacter_name_table'.
(Fget_char_attribute): Likewise.
(Fput_char_attribute): Likewise.
(Fremove_char_attribute): Use `Vchar_attribute_hash_table' instead of
`remove_char_attribute'.
(Fdefine_char): Return character.
(vars_of_mule_charset): Don't setup `Vcharacter_attribute_table' and
`Vcharacter_name_table'.
(complex_vars_of_mule_charset): Likewise `Vchar_attribute_hash_table'.