Update acknowledgments

README

@@ -419,6 +419,7 @@ Past and present members of the Kerberos Team at MIT:
 The following external contributors have provided code, patches, bug
 reports, suggestions, and valuable resources:
 
+    Ian Abbott
     Brandon Allbery
     Russell Allbery
     Brian Almeida
@@ -428,6 +429,7 @@ reports, suggestions, and valuable resources:
     Mark Bannister
     David Bantz
     Alex Baule
+    Adam Bernstein
     Arlene Berry
     Jeff Blaine
     Radoslav Bodo
@@ -444,6 +446,7 @@ reports, suggestions, and valuable resources:
     Simon Cooper
     Sylvain Cortes
     Nalin Dahyabhai
+    Mark Davies
     Dennis Davis
     Mark Deneen
     Roland Dowdeswell
@@ -458,6 +461,7 @@ reports, suggestions, and valuable resources:
     JC Ferguson
     William Fiveash
     Ákos Frohner
+    Sebastian Galiano
     Marcus Granado
     Scott Grizzard
     Helmut Grohne
@@ -479,6 +483,7 @@ reports, suggestions, and valuable resources:
     Holger Isenberg
     Pavel Jindra
     Joel Johnson
+    W. Trevor King
     Mikkel Kruse
     Volker Lendecke
     Jan iankko Lieskovsky
@@ -493,6 +498,7 @@ reports, suggestions, and valuable resources:
     Kyle Moffett
     Paul Moore
     Keiichi Mori
+    Michael Morony
     Zbysek Mraz
     Edward Murrell
     Nikos Nikoleris
@@ -518,6 +524,7 @@ reports, suggestions, and valuable resources:
     Bjørn Tore Sund
     Rathor Vipin
     Jorgen Wahlsten
+    Stef Walter
     Max (Weijun) Wang
     John Washington
     Kevin Wasserman