Minor fixes

src/web/auth.js

@@ -127,7 +127,7 @@ function handleLogout(req, res) {
     res.clearCookie("auth");
     req.user = res.user = null;
     // Try to find an appropriate redirect
-    var dest = req.params.dest || req.header("referer");
+    var dest = req.body.dest || req.header("referer");
     dest = dest && dest.match(/login|logout|account/) ? null : dest;
 
     var host = req.hostname;

src/web/routes/channel.js

@@ -8,7 +8,7 @@ export default function initialize(app, ioConfig) {
     app.get('/r/:channel', (req, res) => {
         if (!req.params.channel || !CyTubeUtil.isValidChannelName(req.params.channel)) {
             throw new HTTPError(`"${sanitizeText(req.params.channel)}" is not a valid ` +
-                    'channel name.', { status: HTTPStatus.BAD_REQUEST });
+                    'channel name.', { status: HTTPStatus.NOT_FOUND });
         }
 
         const endpoints = ioConfig.getSocketEndpoints();

templates/httperror.jade

@@ -1,6 +1,8 @@
 mixin notfound()
   h1 Not Found
   p The page you were looking for doesn't seem to exist.  Please check that you typed the URL correctly.
+  if message
+    p Reason: #{message}
 mixin forbidden()
   h1 Forbidden
   p You don't have permission to access <code>#{path}</code>