Use EVP API for truncated SHA-2 with LibreSSL

Index: src/sys-crypto-md.h
--- src/sys-crypto-md.h.orig
+++ src/sys-crypto-md.h
@@ -496,7 +496,7 @@ SHA512_Update(SHA512_CTX *ctx, const void *data, size_
 #ifdef BORINGSSL_API_VERSION
 typedef SHA512_CTX SHA512_256_CTX;
 #endif
-#if OPENSSL_VERSION_NUMBER >= 0x30000000L
+#if OPENSSL_VERSION_NUMBER >= 0x30000000L || defined(LIBRESSL_VERSION_NUMBER)
 #include <openssl/evp.h>
 
 #ifdef USE_LIB_CRYPTO_MD4