SF bug/patch #1433877: string parameter to ioctl not null terminated

The new char-array used in ioctl calls wasn't explicitly NUL-terminated;
quite probably the cause for the test_pty failures on Solaris that we
circumvented earlier. (I wasn't able to reproduce it with this patch, but it
has been somewhat elusive to start with.)
diff --git a/Misc/ACKS b/Misc/ACKS
index de1d8a2..3f1b47c 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -33,6 +33,7 @@
 Luigi Ballabio
 Michael J. Barber
 Chris Barker
+Quentin Barnes
 Cesar Eduardo Barros
 Des Barry
 Ulf Bartelt