Flushing out bk changes in a nested repo

Product P csets P+C csets list P csets which touch any file in any P+C repo; no C csets listed unless -v/-vv P+C files

Component C csets C csets C csets that touch files C files

Product + -V P+C csets P+C csets Differs from Product case in that C csets are listed as well in no -v case P+C files

Product + -P P csets P csets P csets, only P files searched P files

NOTE: - in the -P case C csets are not listed - the -V case is only useful without -v - very common: bk changes -r+ -nd:KEY:

Existing version:

Product P csets P+C csets list P csets which touch files in P that match P files

Component C csets C files C csets that touch files

Product + -V P+C csets P+C csets list P+C csets that touch files in P+C that match P+C files