Bo Chen ac3f51002d vmm: Implement Clone and Drop for VmConfig
The custom 'clone' duplicates 'preserved_fds' so that the validation
logic can be safely carried out on the clone of the VmConfig.

The custom 'drop' ensures 'preserved_fds' are safely closed when the
holding VmConfig instance is destroyed.

Signed-off-by: Bo Chen <chen.bo@intel.com>
2023-04-18 16:40:57 -07:00
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