bpo-36582: Make collections.UserString.encode() return bytes, not str (GH-13138) (GH-15557)

(cherry picked from commit 2a16eea71f56c2d8f38c295c8ce71a9a9a140aff)

Co-authored-by: Daniel Fortunov <asqui@users.noreply.github.com>
diff --git a/Misc/ACKS b/Misc/ACKS
index ab874e9..5a8494f 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -509,6 +509,7 @@
 Michael Foord
 Amaury Forgeot d'Arc
 Doug Fort
+Daniel Fortunov
 Evens Fortuné
 Chris Foster
 John Fouhy