+/* multipoll_add
+ *
+ * Add a file descriptor to be waited on in a struct mpentries.
+ *
+ * @ent: the struct mpentries to add an fd to
+ * @fd: the fd to wait on
+ * @events: a mask of the types of events to wait on, see the poll(2) man page
+ * @func: the callback function to be called if there is activity on the fd
+ * @priv: the private pointer to pass to func
+ * @destroy_priv: a callback to destroy the priv pointer when the mpentries
+ is destroyed; may be NULL
+ */
+