(U+5BC3): Separate C3-3541; define as an abstract character.

(U+5BC3): Separate C3-3541; define as an abstract character.
(J83-5563): Use `<-vulgar*sources' instead of char-ref in `<-vulgar';
use `<-denotational' for U+5BC3; use `->subsumptive' to integrate with
C3-3541.
(J78-5563): Use `<-denotational' for U+5BC3.
(K0-6A32): Likewise.
(JC3-4AB8): Moved into U-0002F86D.
(U-0002F86D): Use `<-denotational' for U+5BC3; use `->subsumptive'.
(U+5BC4): Use `->subsumptive'.