@deftypefun {int} {gnutls_x509_crl_set_next_update} (gnutls_x509_crl_t @var{crl}, time_t @var{exp_time})
@var{crl}: should contain a gnutls_x509_crl_t type

@var{exp_time}: The actual time

This function will set the time this CRL will be updated.
This is an optional value to be set on a CRL and this call
can be omitted when generating a CRL.

Prior to GnuTLS 3.5.7, setting a nextUpdate field was required
in order to generate a CRL.

@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS}  (0) is returned, otherwise a
negative error value.
@end deftypefun