Made settings docs link to cache parameters more specific.

docs/ref/settings.txt

@@ -220,7 +220,7 @@ Extra parameters to pass to the cache backend. Available parameters
 vary depending on your cache backend.
 
 Some information on available parameters can be found in the
-:doc:`Cache Backends </topics/cache>` documentation. For more information,
+:ref:`cache arguments <cache_arguments>` documentation. For more information,
 consult your backend module's own documentation.
 
 .. setting:: CACHES-TIMEOUT

docs/topics/cache.txt

@@ -364,6 +364,8 @@ Note: Without a really compelling reason, such as a host that doesn't support
 them, you should stick to the cache backends included with Django. They've
 been well-tested and are easy to use.
 
+.. _cache_arguments:
+
 Cache arguments
 ---------------