Redirect /posts/ to /

Opening /posts/ gives a 404, since only the individual posts live
below it.  Add a page at /posts/ that redirects to the front page.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

Author: troglobit

posts.html

@@ -0,0 +1,19 @@
+---
+layout: null
+permalink: /posts/
+sitemap: false
+---
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <title>Redirecting&hellip;</title>
+  <link rel="canonical" href="{{ '/' | relative_url }}">
+  <meta http-equiv="refresh" content="0; url={{ '/' | relative_url }}">
+  <meta name="robots" content="noindex">
+  <script>location.replace("{{ '/' | relative_url }}");</script>
+</head>
+<body>
+  <p><a href="{{ '/' | relative_url }}">Click here if you are not redirected.</a></p>
+</body>
+</html>