openssl: remove CONST_ASN1_BIT_STRING.

#define HAVE_OPAQUE_EVP_PKEY 1 /* since 1.1.0 -pre3 */

#define HAVE_OPAQUE_RSA_DSA_DH 1 /* since 1.1.0 -pre5 */

#define CONST_EXTS const

#define CONST_ASN1_BIT_STRING const

#define HAVE_ERR_REMOVE_THREAD_STATE_DEPRECATED 1

#else

/* For OpenSSL before 1.1.0 */

#define X509_get0_notBefore(x) X509_get_notBefore(x)

#define X509_get0_notAfter(x) X509_get_notAfter(x)

#define CONST_EXTS /* nope */

#define CONST_ASN1_BIT_STRING /* nope */

#ifdef LIBRESSL_VERSION_NUMBER

static unsigned long OpenSSL_version_num(void)

{

    EVP_PKEY *pubkey=NULL;

    int j;

    char *ptr;

    CONST_ASN1_BIT_STRING ASN1_BIT_STRING *psig = NULL;

    const ASN1_BIT_STRING *psig = NULL;

    X509_NAME_print_ex(mem, X509_get_subject_name(x), 0, XN_FLAG_ONELINE);

    push_certinfo("Subject", i);