#438 Enhance FS COPY to accommodate files > 4GB

[mcondon]

Currently, there's a limit when using 32-bit
operating systems of ~4GB (2^32 bytes) on the size of
a file that the FS COPY request can handle. Other
copy utilities can do this (scp, etc) on 32-bit OS'es.

It would be great to have it accomodate files larger
than this. This is especially important in testing
environments involving large data sets like database
dumps and snapshots.

[Sharon Lucas]

The FS service does not currently provided support copying files >= 4GB on 64-bit operating systems either.

[Patrick Roy]

We also ran into this issue. It would be nice to see it addressed. Can the priority be bumped up?