cmd/mbf: close on abort completion

This enables synchronisation on the client side via epoll.

Signed-off-by: Ophestra <cat@gensokyo.uk>

cmd/mbf/daemon.go

@@ -194,11 +194,11 @@ func serve(
 						}
 
 					case specialAbort:
+						log.Println("aborting all pending cures")
+						cm.c.Abort()
 						if _err := conn.Close(); _err != nil {
 							log.Println(_err)
 						}
-						log.Println("aborting all pending cures")
-						cm.c.Abort()
 					}
 
 					return
@@ -339,5 +339,10 @@ func abortRemote(
 	defer close(done)
 
 	err = writeSpecialHeader(conn, specialAbort)
+	if err == nil {
+		if _, err = conn.Read(make([]byte, 1)); err == io.EOF {
+			err = nil
+		}
+	}
 	return errors.Join(err, conn.Close())
 }