[p4] finding origins

[Robert Cowham]

> Note that with the latest version or two of the server, (lurking in
undoc):
>
> C:\bruno_ws>p4 fstat -Oc //depot/jam/rel2.1/src/jam.c
> ... depotFile //depot/Jam/REL2.1/src/jam.c
> ... headAction branch
> ... headType text
> ... headTime 1106847349
> ... headRev 1
> ... headChange 749
> ... headModTime 1106847325
> ... lbrFile //depot/Jam/MAIN/src/jam.c          <==== what you want
> ... lbrRev 1.16
> ... lbrType text

The lbrFile is the origin of lazy copies.

Robert