(BC-8A73): Unify <CJK RADICAL MEAT>; use `<-denotational@component'

(BC-8A73): Unify <CJK RADICAL MEAT>; use `<-denotational@component'
for IWDS1-0053 instead of `<-denotational' for A-UU+2EBC.
(BC-8958): Use `<-subsumptive' instead of `<-denotational' for
BC-8A73.
(IWDS1-0021): New abstract component.
(BC-88F0): Use IWDS1-0021 instead of A-UU+2EBC as its mother; unify
IWDS1-0020.
(U+43CC): Apply new conventions for glyph granularity.
(UU+43CC): Add `sound@ja/on/{kan|go}'.
(U+808E): Apply new conventions for glyph granularity; subsume
CB05089.
(U-0002664D): Likewise.
(A-BC-8CEC): New abstract node.
(BC-8CEC): Add `<-denotational' for A-BC-8CEC; apply new conventions
for glyph granularity.
(BC-8CA9): Apply new conventions for glyph granularity.
(U-00026803): Use U+9F4A-itaiji-005 in `ideographic-structure'; add
`sound@ja/on'; add `<-same' for U+81CD.
(U+81CD): Add `ideographic-structure'.