(U+6BDF): Apply new conventions for glyph granularity; add

(U+6BDF): Apply new conventions for glyph granularity; add
`<-denotational@usage' for BUCS+6BDF.
(U-00023B96): New character.
(U+6C00): Apply new conventions for glyph granularity; add
`<-denotational@usage' for A2-DJT-05906.
(U-00023BEB): Use `->denotational' and `->subsumptive'; add
`<-denotational@usage' for A2-DJT-05906.
(U-00023C1D): Add `ideographic-structure'; add `sound@ja/on'; add
`<-vulgar' for UU+6C00.
(BUCS+6BDF): New abstract node; unify A2-DJT-05852.
(A2-DJT-05906): New abstract node.