admin: Introduce virAdmServer structure

This is the key structure of all management operations performed on the
daemon/clients. An admin client needs to be able to identify
another client (either admin or non-privileged client) to perform an
action on it. This identification includes a server the client is
connected to, thus a client-side representation of a server is needed.

Signed-off-by: Erik Skultety <eskultet@redhat.com>

include/libvirt/libvirt-admin.h

@@ -42,6 +42,14 @@ extern "C" {
  */
 typedef struct _virAdmConnect virAdmConnect;
 
+/**
+ * virAdmServer:
+ *
+ * a virAdmServer is a private structure and client-side representation of
+ * a remote server object
+ */
+typedef struct _virAdmServer virAdmServer;
+
 /**
  * virAdmConnectPtr:
  *
@@ -51,6 +59,15 @@ typedef struct _virAdmConnect virAdmConnect;
  */
 typedef virAdmConnect *virAdmConnectPtr;
 
+/**
+ * virAdmServerPtr:
+ *
+ * a virAdmServerPtr is a pointer to a virAdmServer structure,
+ * this is the type used to reference client-side representation of a
+ * remote server object throughout all the APIs.
+ */
+typedef virAdmServer *virAdmServerPtr;
+
 virAdmConnectPtr virAdmConnectOpen(const char *name, unsigned int flags);
 int virAdmConnectClose(virAdmConnectPtr conn);