Fixed authentication by removing extraneous newline character from the hashed string.

Author: jphalip

varnish.py

@@ -110,7 +110,7 @@ def quit(self):
 
     def auth(self, secret, content):
         challenge = content[:32]
-        response = sha256('%s\n%s\n%s\n' % (challenge, secret, challenge))
+        response = sha256('%s\n%s%s\n' % (challenge, secret, challenge))
         response_str = 'auth %s' % response.hexdigest()
         self.fetch(response_str)