--enable-force-kpdf-drm is a configure option, it defaults to NO, if YES DRM is ALLWAYS obeyed
skip_drm is a kiosk option, it defaults to YES, if NO, means the user is not authorized to skip DRM and DRM is ALLWAYS obeyed
if previous options are no and yes, the user sees a GUI option called Obey DRM limitations that defaults to YES but the user can set to NO from the GUI

svn path=/trunk/kdegraphics/kpdf/; revision=394412