User files are restored through the Files API so the file cache,
versions and trash stay consistent: modes new-folder (default, into
'Restored <date>/<path>'), merge (overwritten files keep their old
content as a version) and replace (extra files go to the trash). Each
file is staged under a temporary name and moved into place only after
all its blobs were verified. Any snapshot path can also be restored raw
to a local directory (disaster recovery).
Tested on NC34: all three modes restore checksum-identical files, the
overwritten content is kept as a version, the extra file is in the
trash, no temporary files remain.
dillard
ebd9737f51