Don't log an error when we get a 404 request - it's normal to get 404s.

lib/antinode.js

@@ -93,24 +93,28 @@ function try_stream(path, req, resp) {
 
     fs.stat(path, function (err, stats) {
         if (err) {
-            log.error("fs.stat(",path,") failed: ", err);
+            // ENOENT is normal on 'file not found'
+            if (err.errno != process.ENOENT) { 
+                // any other error is abnormal - log it
+                log.error("fs.stat(",path,") failed: ", err);
+            }
             return file_not_found();
         }
         if (stats.isDirectory()) {
             return try_stream(pathlib.join(path, "index.html"), req, resp);
         }
         if (!stats.isFile()) {
-            file_not_found();
+            return file_not_found();
         } else {
             var if_modified_since = req.headers['if-modified-since'];
             if (if_modified_since) {
                 var req_date = new Date(if_modified_since);
                 if (stats.mtime <= req_date && req_date <= Date.now()) {
-                    not_modified();
+                    return not_modified();
                 }
                 else stream_file(path, stats);
             } else {
-                stream_file(path, stats);
+                return stream_file(path, stats);
             }
         }
     });
@@ -119,8 +123,7 @@ function try_stream(path, req, resp) {
         fs.open(file,'r', 0660, function(err, fd) {
             if (err) {
                 log.debug("fs.open(",file,") error: ",err.message);
-                file_not_found();
-                return;
+                return file_not_found();
             }
             log.debug("opened", path, "on fd", fd);