Fix assorted bugs in packaging.util.cfg_to_args (#11595).

Original patch by Erik Bray.
diff --git a/Misc/ACKS b/Misc/ACKS
index de5410c..5380c72 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -116,6 +116,7 @@
 Georg Brandl
 Christopher Brannon
 Terrence Brannon
+Erik Bray
 Brian Brazil
 Dave Brennan
 Tom Bridgman