Fixed #18042 -- Advanced deprecation warnings.

Thanks Ramiro for the patch.

django/core/cache/backends/memcached.py

@@ -130,7 +130,7 @@ class CacheClass(BaseMemcachedCache):
         import warnings
         warnings.warn(
             "memcached.CacheClass has been split into memcached.MemcachedCache and memcached.PyLibMCCache. Please update your cache backend setting.",
-            PendingDeprecationWarning
+            DeprecationWarning
         )
         try:
             import memcache

django/core/management/__init__.py

@@ -395,7 +395,7 @@ def setup_environ(settings_mod, original_settings_path=None):
         "you likely need to update your 'manage.py'; "
         "please see the Django 1.4 release notes "
         "(https://docs.djangoproject.com/en/dev/releases/1.4/).",
-        PendingDeprecationWarning)
+        DeprecationWarning)
 
     # Add this project to sys.path so that it's importable in the conventional
     # way. For example, if this file (manage.py) lives in a directory
@@ -451,7 +451,7 @@ def execute_manager(settings_mod, argv=None):
         "you likely need to update your 'manage.py'; "
         "please see the Django 1.4 release notes "
         "(https://docs.djangoproject.com/en/dev/releases/1.4/).",
-        PendingDeprecationWarning)
+        DeprecationWarning)
 
     setup_environ(settings_mod)
     utility = ManagementUtility(argv)