Ack all bug reports and patches. Is this all of them?

README

@@ -22,8 +22,10 @@ The following people have made contributions:
     Nickolai Zeldovich
     Austin Clements
 
-In addition, we are grateful for the patches contributed by Greg
-Price, Yandong Mao, and Hitoshi Mitake.
+In addition, we are grateful for the bug reports and patches contributed by
+Silas Boyd-Wickizer, Peter Froehlich, Shivam Handa, Anders Kaseorg, Eddie
+Kohler, Yandong Mao, Hitoshi Mitake, Carmi Merimovich, Joel Nider, Greg Price,
+Eldar Sehayek, Yongming Shen, Stephen Tu, and Zouchangwei.
 
 The code in the files that constitute xv6 is
 Copyright 2006-2014 Frans Kaashoek, Robert Morris, and Russ Cox.