bpo-21475: Support the Sitemap extension in robotparser (GH-6883)

diff --git a/Misc/ACKS b/Misc/ACKS
index 665b4dd..5c05ee7 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -109,6 +109,7 @@
 Mike Bayer
 Samuel L. Bayer
 Bo Bayles
+Christopher Beacham AKA Lady Red
 Tommy Beadle
 Donald Beaudry
 David Beazley
@@ -1760,6 +1761,7 @@
 Blake Winton
 Jean-Claude Wippler
 Stéphane Wirtel
+Peter Wirtz
 Lars Wirzenius
 John Wiseman
 Chris Withers