(A-RUI6-E079): New abstract node.

(A-RUI6-E079): New abstract node.
(RUI6-E079): New character; use `<-denotational' for A-RUI6-E079.
(B-D7CF): Unify A-IWDSU+8C63.
(U+8C5C): Add `ideographic-structure'; add `sound@ja/on'.
(U+8C61): Add `ideographic-structure'.
(U-00027C3D): Apply new conventions for glyph granularity.
(U+8C63): Add `ideographic-structure'; add `sound@ja/on'; add some
relations for other characters.
(U-00027C56): Apply new conventions for glyph granularity.
(U-00027C5A): Likewise.
(U+474A): Likewise.
(U+8C6F): Likewise.
(U-00027C80): Likewise.
(U-00027C8C): Likewise.