Issue #16752: Add a missing import to modulefinder.

Also fix Misc/ACKS to put part of it back in alphabetical order and
remove some duplicate names.

Patch by Berker Peksag.
diff --git a/Misc/ACKS b/Misc/ACKS
index a5351b3..e4d1783 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -894,15 +894,13 @@
 William Park
 Harri Pasanen
 Gaël Pasgrimaud
-Berker Peksag
-Bo Peng
-Joe Peterson
 Randy Pausch
 Samuele Pedroni
 Justin Peel
 Marcel van der Peijl
 Berker Peksag
 Steven Pemberton
+Bo Peng
 Santiago Peresón
 George Peristerakis
 Mathieu Perreault