Fixed spelling of "logged-in" when used as an adjective in docs.

Author: mengxunQAQ

docs/ref/clickjacking.txt

@@ -15,7 +15,7 @@ have loaded in a hidden frame or iframe.
 An example of clickjacking
 ==========================
 
-Suppose an online store has a page where a logged in user can click "Buy Now" to
+Suppose an online store has a page where a logged-in user can click "Buy Now" to
 purchase an item. A user has chosen to stay logged into the store all the time
 for convenience. An attacker site might create an "I Like Ponies" button on one
 of their own pages, and load the store's page in a transparent iframe such that

docs/topics/cache.txt

@@ -783,7 +783,7 @@ uniquely identify the cache fragment:
 
     {% load cache %}
     {% cache 500 sidebar request.user.username %}
-        .. sidebar for logged in user ..
+        .. sidebar for logged-in user ..
     {% endcache %}
 
 If :setting:`USE_I18N` is set to ``True`` the per-site middleware cache will

docs/topics/security.txt

@@ -75,7 +75,7 @@ control.
 
 :ref:`CSRF protection works <how-csrf-works>` by checking for a secret in each
 POST request. This ensures that a malicious user cannot "replay" a form POST to
-your website and have another logged in user unwittingly submit that form. The
+your website and have another logged-in user unwittingly submit that form. The
 malicious user would have to know the secret, which is user specific (using a
 cookie).