Wordpress enforced SSL with NGINX and/or CloudFlare as reverse Proxy

.htaccess

<IfModule mod_rewrite.c>
  RewriteEngine On
  # This is needed for NGINX and CloudFlare Reverse Proxy Servers
  RewriteCond %{HTTP:X-Forwarded-Proto} =http [OR]
  # This is just in case
  RewriteCond %{HTTP:X-Forwarded-Proto} =""
  RewriteCond %{HTTPS} !=on
  # Here comes the redirect to SSL
  RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
  RewriteBase /
  RewriteRule ^index\.php$ - [L]
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteRule . /index.php [L]
</IfModule>

wp-config.php

define('WP_HOME','https://hochwald.net');
define('WP_SITEURL','https://hochwald.net');

define('FORCE_SSL_ADMIN', true);
if (strpos($_SERVER['HTTP_X_FORWARDED_PROTO'], 'https') !== false)
  $_SERVER['HTTPS']='on';