(M-23116): Unify U-000250EE.

(M-23116): Unify U-000250EE.
(M-23117): Unify U-000250F0.
(BUCS+8846): New abstract character.
(B-B2B3): Changed to abstract character; add `<-denotational' for
BUCS+8846.
(U+773E): Use `->denotational' and `->subsumptive'; add
`<-denotational' for B-B2B3.
(UU+773E): Unify S1-7318; add `<-original' for UU+8846.
(HD-KS261040): New character; unify MJ058166 and S2-7317; add
`<-denotational' for U+773E; add `<-original' for UU+8846.
(U-0002516B): Unify S2-7318; add `<-ancient' for JU+773E and UU+8846.