(U+5369): Unify BC-8B5A.

(U+5369): Unify BC-8B5A.
(U+353E): Unify BC-8BE6.
(U+536A): Unify BC-8D7A.
(U+5373): Use `script' and `<-vulgar-ideograph' instead of `comment';
add `hanyu-dazidian-vol', `hanyu-dazidian-page' and
`hanyu-dazidian-char'; add `ideographic-structure'.
(U+537B): Use `->ideographic-variants' instead of
`variant-of-shinjigen-1'; add `hanyu-dazidian-vol',
`hanyu-dazidian-page' and `hanyu-dazidian-char'; add
`ideographic-structure'.
(U+537D): Use `->ideographic-variants' instead of
`variant-of-shinjigen-1'; unify JC3-45D4.
(M-02875): Separate C6-2F3C; use `->same-ideograph' instead of
`comment'; relate to U-00020A1E.
(C6-2F3C): Unify U-00020A1E.
- Add some CHINA3-JEF code points.
- Add some missing `hanyu-dazidian-vol', `hanyu-dazidian-page' and
  `hanyu-dazidian-char' properties.
- Add some missing `ideographic-structure' properties.
- Merge some CJK Ext-B code points.