SSL: fixed testing OPENSSL_VERSION_NUMBER for OpenSSL 3.0+.

Prior to OpenSSL 3.0, OPENSSL_VERSION_NUMBER used the following format:

MNNFFPPS: major minor fix patch status

Where the status nibble (S) has 0+ for development and f for release.

The format was changed in OpenSSL 3.0.0, where it is always zero:

MNN00PP0: major minor patch

src/event/ngx_event_openssl.c

@@ -1376,7 +1376,7 @@ ngx_ssl_dhparam(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *file)
     if (SSL_CTX_set0_tmp_dh_pkey(ssl->ctx, dh) != 1) {
         ngx_ssl_error(NGX_LOG_EMERG, ssl->log, 0,
                       "SSL_CTX_set0_tmp_dh_pkey(\"%s\") failed", file->data);
-#if (OPENSSL_VERSION_NUMBER >= 0x3000001fL)
+#if (OPENSSL_VERSION_NUMBER >= 0x30000010L)
         EVP_PKEY_free(dh);
 #endif
         BIO_free(bio);

src/event/ngx_event_openssl.h

@@ -96,7 +96,7 @@
 #endif
 
 
-#if (OPENSSL_VERSION_NUMBER < 0x3000000fL)
+#if (OPENSSL_VERSION_NUMBER < 0x30000000L)
 #define SSL_group_to_name(s, nid)    NULL
 #endif