Sets the certificate database that is used to verify peer certificates.
This is set to the default database by default. See
g_dtls_backend_get_default_database(). If set to %NULL, then
peer certificate validation will always set the
%G_TLS_CERTIFICATE_UNKNOWN_CA error (meaning
#GDtlsConnection::accept-certificate will always be emitted on
client-side connections, unless that bit is not set in
#GDtlsClientConnection:validation-flags).
Sets the certificate database that is used to verify peer certificates. This is set to the default database by default. See g_dtls_backend_get_default_database(). If set to %NULL, then peer certificate validation will always set the %G_TLS_CERTIFICATE_UNKNOWN_CA error (meaning #GDtlsConnection::accept-certificate will always be emitted on client-side connections, unless that bit is not set in #GDtlsClientConnection:validation-flags).