CONFIG: Use default config when none provided This patch makes SSSD possibly useful "out of the box" by allowing packagers to provide a default config file located in $LIBDIR/sssd/conf that will be copied by the monitor to /etc/sssd if no file already exists in that location. This will make it possible to have SSSD set up to have distribution-specific default configuration, such as enabling the proxy provider to cache /etc/passwd (such as in the provided example in this patch). Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>