Improve the message we log on unexpected dirauth status code

It's still not great, but should be less confusing what's wrong
here.

Closes ticket 1121.

changes/bug1121

@@ -0,0 +1,4 @@
+  o Minor bugfixes (logging):
+    - Provide a better log message when a directory authority responds
+      to an upload with an unexpected status code. Fixes bug 11121;
+      bugfix on 0.1.0.1-rc.

src/or/directory.c

@@ -2895,8 +2895,9 @@ handle_response_upload_dir(dir_connection_t *conn,
     break;
   default:
     log_warn(LD_GENERAL,
-             "http status %d (%s) reason unexpected while uploading "
-             "descriptor to server '%s:%d').",
+             "HTTP status %d (%s) was unexpected while uploading "
+             "descriptor to server '%s:%d'. Possibly the server is "
+             "misconfigured?",
              status_code, escaped(reason), conn->base_.address,
              conn->base_.port);
     break;
@@ -2932,8 +2933,8 @@ handle_response_upload_vote(dir_connection_t *conn,
     break;
   default:
     log_warn(LD_GENERAL,
-             "http status %d (%s) reason unexpected while uploading "
-             "vote to server '%s:%d').",
+             "HTTP status %d (%s) was unexpected while uploading "
+             "vote to server '%s:%d'.",
              status_code, escaped(reason), conn->base_.address,
              conn->base_.port);
     break;
@@ -2968,8 +2969,8 @@ handle_response_upload_signatures(dir_connection_t *conn,
     break;
   default:
     log_warn(LD_GENERAL,
-             "http status %d (%s) reason unexpected while uploading "
-             "signatures to server '%s:%d').",
+             "HTTP status %d (%s) was unexpected while uploading "
+             "signatures to server '%s:%d'.",
              status_code, escaped(reason), conn->base_.address,
              conn->base_.port);
     break;