Type:	string
	UTF-8 encoded character data
Name:	userdevice
	user-friendly device name e.g. 0,1,2,etc.

Field is read-write

• string get_userdevice (session session_id, VBD self)

  Get the userdevice field of the given VBD.

• void set_userdevice (session session_id, VBD self, string value)

  Set the userdevice field of the given VBD.