* This is due to the G_MESSAGES_DEBUG change in glib
 * We manage our own debug categories, so if G_MESSAGES_DEBUG
   is not being used but GCR_DEBUG or GCK_DEBUG are set
   we unconditionally print the debug messages.
 * If G_MESSAGES_DEBUG is being used, then make all the
   debug messages available to Glib.
 * Can build with -DGCR_DEBUG=category flags to permanently
   enable certain categories.