(U+73EA): Add `<-formed' for U+572D.

(U+73EA): Add `<-formed' for U+572D.
(U+7409): Use `->subsumptive'.
(U+3ECD): Integrate M-21009.
(U+7402): Use `->subsumptive'.
(U+3ED0): New character.
(U+3EE2): New character.
(U+7460): Unify S1-4907; add `<-formed' for S1-4905.
(g2-JX1-7833): Unify g2-HD-JC8819 instead of G-HD-JC8819.
(U+3EF8): Integrate M-21243.
(U+74A2): Unify S1-4908; add `<-formed@shinjigen/1ed' for S1-4905; add
`<-formed@shinjigen/rev' for U+7460.
(U+3EF9): Integrate M-21251.
(U+3EFA): Integrate M-21254.
(U+3EFB): New character.
(g2-J90U+74D8): Unify g2-HD-JB4479 instead of G-HD-JB4479.
(g2-JX2-712A): Unify g2-HD-JD8110 instead of G-HD-JD8110.