Issue #1675951: Allow GzipFile to work with unseekable file objects.
Patch by Florian Festi.
diff --git a/Misc/ACKS b/Misc/ACKS
index 4f2780a..5d12c1f 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -260,6 +260,7 @@
 Mark Favas
 Niels Ferguson
 Sebastian Fernandez
+Florian Festi
 Vincent Fiack
 Tomer Filiba
 Jeffrey Finkelstein