blockdev: unset inappropriate flags when changing medium
Most importantly, this removes BDRV_O_TEMPORARY, to avoid unlink()ing an image which replaces a snapshotted one. Signed-off-by: NAlyssa Milburn <fuzzie@fuzzie.org> Message-id: 20160206133618.GA16635@li141-249.members.linode.com Signed-off-by: NMax Reitz <mreitz@redhat.com>
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