Use `->subsumptive' or `{<-|->}denotational' for some character

Use `->subsumptive' or `{<-|->}denotational' for some character
definitions.
(C5-2927): Map to U-0002F88A.
(U-0002F88A): New character.
(U+5ECA): Use `->denotational' and `->subsumptive'.
(JX1-742E): Use `<-denotational' for U+5ECA; don't map to U-0002F88E;
separate K0-5546; unify U+F928; use `->subsumptive' to integrate
K0-5546 and K0-5227.
(U-0002F88E): Use `<-denotational' for U+5ECA.
(B-B459): Likewise; use `->subsumptive'.
(U-0002F88F): New character.
(C5-455D): Map to U-0002F88F; separate M-09472.
(U-000222A7): New character.
(M-09474): Map to U-000222A7.