Fixed a minor typo "bot" instead of "boto" noticed while we

were looking at re-try logic here.

Author: kopertop

boto/auth.py

@@ -206,7 +206,7 @@ def _calc_signature(self, params, *args):
         keys.sort(cmp = lambda x, y: cmp(x.lower(), y.lower()))
         pairs = []
         for key in keys:
-            val = bot.utils.get_utf8_value(params[key])
+            val = boto.utils.get_utf8_value(params[key])
             pairs.append(key + '=' + urllib.quote(val))
         qs = '&'.join(pairs)
         return (qs, base64.b64encode(hmac.digest()))