Avoid format string warnings with clang by adding proper format
attribution.
Changes 2.4.1:
* USE_I18N=False fixed
* some frontend css stuff fixed
* check_copy_relations fixed for abstract classes
* non public frontend languages fixed

Changes 2.4.0:
* Compatibility with Django 1.4 and 1.5 (1.3 support dropped)
* Support for Python 2.5 dropped
* CMS_MAX_PAGE_PUBLISH_REVERSIONS has been added
* Reversion integration has changed to limit DB size
* CMS_LANGUAGE setting has changed
* CMS_HIDE_UNTRANSLATED setting removed
* CMS_LANGUAGE_FALLBACK setting removed
* CMS_LANGUAGE_CONF setting removed
* CMS_SITE_LANGUAGES setting removed
* CMS_FRONTEND_LANGUAGES setting removed
* MultilingualMiddleware has been removed
* CMS_FLAT_URLS has been removed
* CMS_MODERATOR has been removed and replaced with simple publisher.
* PlaceholderAdmin has now language tabs and has support for django-hvad
* Added `cms.middleware.language.LanguageCookieMiddleware`
* Added CMS_RAW_ID_USERS
Updated www/py-django-cms to 2.4.1
Update security/netpgpverify to version 20130426

Change from previous version:

+ don't assume that output of a "cat" command (where output is sent to
stdout if the signature is verified) is able to be written with stdio.
Note update of security/netpgpverify to 20130426