Call bundle_CleanDatalinks() after UpdateSet() in case we're

dropping out of background/foreground/direct mode.

This avoids either having to wait for the redial timer before
exiting or jaming up in select() waiting for something that'll
never happen.

usr.sbin/ppp/main.c

@@ -519,6 +519,7 @@ DoLoop(struct bundle *bundle)
     /* All our prompts and the diagnostic socket */
     descriptor_UpdateSet(&server.desc, &rfds, NULL, NULL, &nfds);
 
+    bundle_CleanDatalinks(bundle);
     if (bundle_IsDead(bundle))
       /* Don't select - we'll be here forever */
       break;