acks += Zsolt Dollenstein (#6490)

diff --git a/Misc/ACKS b/Misc/ACKS
index 13b88b5..5efe37f 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -388,6 +388,7 @@
 Josip Djolonga
 Walter Dörwald
 Jaromir Dolecek
+Zsolt Dollenstein
 Brendan Donegan
 Ismail Donmez
 Robert Donohue