Fix typos and formatting in reverseproxy.rst

It is:

  .. code-block:: LANGUAGE

      Awesome Sourcecode

users/reverseproxy.rst

@@ -4,26 +4,27 @@ Reverse Proxy Setup
 ===================
 
 A reverse proxy allow you to "pass" requests through your web server to another
-site or program. The reverse proxy will make it look like Syncthing's GUI
-is a page within your existing site.
+site or program. The reverse proxy will make it look like Syncthing's GUI is a
+page within your existing site.
 
 This is especially useful if:
 
--   You need to access the GUI on port 80 or 443 but you already host a website on the same device.
--   You want to share SSL certificates with an existing site.
--   You want to share authentification with an existing setup.
+- You need to access the GUI on port 80 or 443 but you already host a website
+  on the same device.
+- You want to share SSL certificates with an existing site.
+- You want to share authentification with an existing setup.
 
 Server Configuration
 --------------------
 
 If you have access to your web server's configuration use the following
-examples to pass the location **/syncthing** on your web server to Syncthing's
-GUI hosted on **localhost:8384**.
+examples to pass the location ``/syncthing`` on your web server to Syncthing's
+GUI hosted on ``localhost:8384``.
 
 Apache
 ~~~~~~
 
-::
+.. code-block:: apache
 
     ProxyPass /syncthing/ http://localhost:8384/
     <Location /syncthing/>
@@ -35,14 +36,14 @@ Apache
 Nginx
 ~~~~~
 
-::
+.. code-block:: nginx
 
     location /syncthing/ {
       proxy_set_header        Host $host;
       proxy_set_header        X-Real-IP $remote_addr;
       proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
       proxy_set_header        X-Forwarded-Proto $scheme;
-    
+
       proxy_pass              http://localhost:8384/;
     }
 
@@ -55,11 +56,11 @@ the following technique.
 Apache
 ~~~~~~
 
-Add the configuration bellow to a **.htaccess** file in the folder of your
-webroot which should redirect to the WebUI, **/syncthing** to produce the same
+Add the configuration below to a ``.htaccess`` file in the folder of your
+webroot which should redirect to the WebUI, ``/syncthing`` to produce the same
 behaviour as above
 
-::
+.. code-block:: apache
 
     RewriteEngine On
     RewriteCond %{HTTPS} !=on