gnome_vfs_xfer change, please test

[Alexander Larsson <alexl redhat com>]

I've just commited some changes to make gnome_vfs_xfer (this is whats
used when nautilus makes copies and moves stuff) so that when a folder
that gets copied exists in the target we merge the two trees,
overwriting only files that actually conflict, instead of just removing
the whole target directory like we used to do.

This is a very central piece of code, and bugs in it is likely to loose
data for users. So, please, could as many people as possible try to
pound on this in various ways using nautilus and try to find cases where
it breaks or does unexpected things.

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 Alexander Larsson                                            Red Hat, Inc 
                   alexl redhat com    alla lysator liu se 
He's a leather-clad overambitious jungle king who hangs with the wrong crowd. 
She's an orphaned blonde schoolgirl on the trail of a serial killer. They 
fight crime!