typo: s/stding/stdin/

git-svn-id: svn://bind10.isc.org/svn/bind10/trunk@1621 e5f2f494-b856-4b98-b285-d166d9295462

src/bin/bindctl/bindcmd.py

@@ -47,7 +47,7 @@ try:
     import readline
     my_readline = readline.get_line_buffer
 except ImportError:
-    my_readline = sys.stding.readline
+    my_readline = sys.stdin.readline
 
 
 CONST_BINDCTL_HELP = """