Booting is possible from virtiofs filesystems. Introduce an option
to control the boot order, like we do for other bootable devices.
+ * hyperv: implement new APIs
+
+ The ``virDomainUndefine()``, ``virDomainUndefineFlags()``,
+ ``virDomainDefineXML()``, ``virDomainAttachDevice()``, and
+ ``virDomainAttachDeviceFlags()``, ``virConnectListAllNetworks()``,
+ ``virConnectNumOfNetworks()``, ``virNetworkLookupByName()``,
+ ``virNetworkLookupByUUID()``, ``virConnectNumOfDefinedNetworks()``,
+ ``virConnectListDefinedNetworks()``, ``virNetworkGetAutostart()``,
+ ``virNetworkIsActive()``, ``virNetworkIsPersistent()``,
+ ``virNetworkGetXMLDesc()``, and ``virDomainScreenshot()``, APIs have been
+ implemented in the Hyper-V driver.
+
* **Improvements**
* **Bug fixes**