[MERGE] Fix #175520 by implementing a --deep option for log

[Ian Clatworthy]

Ian Clatworthy wrote:

>   $bzr log --find-file-ids FILE
>   Create/renames/deletes for FILE: (use log --file-id for more information)
>   file-id AAA:
>     deleted in Z
>     added in Y
>   file-id BBB:
>     deleted in X
>     renamed in W from FILE to FILE.txt
>     added in X

Oops. Make that "added in V".

>   $bzr log --find-file-ids FILE
>   Create/renames/deletes for FILE: (use log --file-id for more information)
>   file-id AAA:
>     delete detected in Z
>     add detected in Y
>   file-id BBB:
>     rename detected in W (FILE => FILE.txt)
>     add detected in X

Ditto. (add detected in V)

Ian C.