Patch 471400: escape single-dot lines; by Jason Hildebrand.

RFC 2049 recommends never outputting a line consisting of a single
dot.
diff --git a/Misc/ACKS b/Misc/ACKS
index 6569766..f09e77c 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -180,6 +180,7 @@
 Bernhard Herzog
 Magnus L. Hetland
 Kevan Heydon
+Jason Hildebrand
 Konrad Hinsen
 David Hobley
 Tim Hochberg