(U+5FCD): Add `<-denotational@usage' for BUCS+5FCD; apply new

(U+5FCD): Add `<-denotational@usage' for BUCS+5FCD; apply new
conventions for glyph granularity.
(U+38FC): Apply new conventions for glyph granularity.
(U-00022665): New character.
(U-00022894): Add `<-denotational@usage' for A2-DJT-03458.
(IU+22894): Unify DJT-03556.
(U+61D6): Apply new conventions for glyph granularity.
(U-0002290C): Likewise.
(U-0002290D): New character.
(M-11429): Add `<-denotational' for U-0002290D; unify IU+2290D,
MJ036465, KOSEKI-128860 and CB09534.
(BUCS+5FCD): New abstract node; unify A2-DJT-03184.
(A2-DJT-03458): New abstract node.