- Merge `hanyu-dazidian-vol', `hanyu-dazidian-page' and

- Merge `hanyu-dazidian-vol', `hanyu-dazidian-page' and
  `hanyu-dazidian-char'.
- Merge Big5-CDP code points.
- Use char-spec instead of char-ref as operators in
  `ideographic-structure' properties.
- Merge CJK Ext-B code points.
(GT-8): Add `->identical' for U-00020089.
(GT-10): Unify M051101.
(GT-22): Unify M050071.
(C2-212E): Use <IDEOGRAPHIC DESCRIPTION CHARACTER SURROUND FROM UPPER
LEFT> instead of <IDEOGRAPHIC DESCRIPTION CHARACTER ABOVE TO BELOW> in
the operator of `ideographic-structure'.
(M-00038): Separate C6-222A; relate to U-000200E0.