FcInitBringUptoDate - reload configuration files if needed
#include <fontconfig/fontconfig.h>
FcBool FcInitBringUptoDate (void);
Checks the rescan interval in the default configuration, checking the
  configuration if the interval has passed and reloading the configuration if
  when any changes are detected. Returns FcFalse if the configuration cannot be
  reloaded (see FcInitReinitialize). Otherwise returns FcTrue.