Issue #16324: _charset parameter of MIMEText now also accepts email.charset.Charset instances.

Initial patch by Claude Paroz.
diff --git a/Misc/ACKS b/Misc/ACKS
index 48e1de9..e00f883 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1024,6 +1024,7 @@
 Alexandre Parenteau
 Dan Parisien
 William Park
+Claude Paroz
 Heikki Partanen
 Harri Pasanen
 Gaël Pasgrimaud