BUILD: enable several LibreSSL hacks, including
SSL_SESSION_get0_id_context is introduced in LibreSSL-2.7.0
async operations are not supported by LibreSSL
early data is not supported by LibreSSL
packet_length is removed from SSL struct in LibreSSL
diff --git a/include/proto/ssl_sock.h b/include/proto/ssl_sock.h
index ce52fb7..586ebb9 100644
--- a/include/proto/ssl_sock.h
+++ b/include/proto/ssl_sock.h
@@ -85,7 +85,7 @@
int ssl_sock_set_generated_cert(SSL_CTX *ctx, unsigned int key, struct bind_conf *bind_conf);
unsigned int ssl_sock_generated_cert_key(const void *data, size_t len);
-#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC)
+#if (OPENSSL_VERSION_NUMBER >= 0x1010000fL) && !defined(OPENSSL_NO_ASYNC) && !defined(LIBRESSL_VERSION_NUMBER)
void ssl_async_fd_handler(int fd);
void ssl_async_fd_free(int fd);
#endif