merge patch to integrate decentralized directories with patch to "only test log.err when Twisted is new enough to let us ignore the generated errors"

src/allmydata/mutable.py

@@ -757,7 +757,7 @@ class Publish:
         # 4a: may need to run recovery algorithm
         # 5: when enough responses are back, we're done
 
-        self.log("starting publish, data is %r" % (newdata,))
+        self.log("got enough peers, datalen is %s" % len(newdata))
 
         self._writekey = self._node.get_writekey()
         assert self._writekey, "need write capability to publish"

src/allmydata/test/test_mutable.py

@@ -111,8 +111,9 @@ class FakeClient:
         self._num_peers = num_peers
         self._peerids = [tagged_hash("peerid", "%d" % i)[:20]
                          for i in range(self._num_peers)]
-    def log(self, msg):
-        log.msg(msg)
+        self.introducer_client = FakeIntroducerClient()
+    def log(self, msg, **kw):
+        return log.msg(msg, **kw)
 
     def get_renewal_secret(self):
         return "I hereby permit you to renew my files"