Merge remote branch 'sebastian/bug2444'

changes/bug2444

@@ -0,0 +1,4 @@
+  o Minor features:
+    - If we did find a configuration file, log a message saying where we found
+      it during startup. Implements ticket 2444.
+

src/or/config.c

@@ -4093,6 +4093,8 @@ load_torrc_from_disk(int argc, char **argv)
           "Unable to open configuration file \"%s\".", fname);
       goto err;
     }
+  } else {
+    log(LOG_NOTICE, LD_CONFIG, "Read configuration file \"%s\".", fname);
   }
 
   return cf;