Use `->subsumptive' for some character definitions.

Use `->subsumptive' for some character definitions.
(U+5986): Use `->subsumptive'; delete `morohashi-daikanwa'.
(G0-5731): Use `<-subsumptive' for U+5986; add `<-simplified@CN' for
G1-5731.
(U-000216B4): New character.
(U+598D): Use `->subsumptive'; add `<-denotational' for J97-552B.
(J97-552B): New abstract character.
(U+5992): Use `->denotational' and `->subsumptive'.
(U+36AB): Use `->denotational' and `->subsumptive'.
(U+599B): Use `->denotational' and `->subsumptive'.
(J0-562C): Add `<-denotational' for U+599B; add
`<-error@jis-x0208' for JX1-4F63; add `<-unknown' for JSP-397B.
(U+59AA): Delete `morohashi-daikanwa'; add `<-simplified@CN' for
G1-657D.
(U+59AD): Use `->denotational' and `->subsumptive'.
(U+59F8): Add `<-denotational' for J97-552B.
(K0-6641): Unify JC3-49B5.
(U-00021769): Use `->denotational' and `->subsumptive'.
(U+5ADA): Use `->denotational' instead of `->subsumptive'.