(U+4987): Use `->subsumptive' to separate representative nodes;

(U+4987): Use `->subsumptive' to separate representative nodes;
integrate JC3-6BD8.
(U-00028C8C): Use `->denotational' instead of `->subsumptive'.
(U-00028CA9): Likewise.
(U-00028CAC): New character.
(U-00028CAB): New character.
(U-00028CAA): New character.
(U-00028CAF): Use `->denotational' instead of `->subsumptive'.
(U-00028CB2): Use `->subsumptive' to separate representative nodes.
(U-00028CB0): New character.
(U-00028CB1): New character.
(U-00028CC2): Use `->subsumptive' to separate representative nodes.