vmm, ch-remote: Add "local" option to send-migration API

Signed-off-by: Rob Bradford <robert.bradford@intel.com>

vmm/src/api/mod.rs

@@ -195,6 +195,8 @@ pub struct VmReceiveMigrationData {
 pub struct VmSendMigrationData {
     /// URL to migrate the VM to
     pub destination_url: String,
+    /// Send memory across socket without copying
+    pub local: bool,
 }
 
 pub enum ApiResponsePayload {