ext/openssl: fix libressl build.

Close GH-12919

Author: devnexen

NEWS

@@ -10,6 +10,10 @@ PHP                                                                        NEWS
   . Fixed bug GH-12996 (Incorrect SCRIPT_NAME with Apache ProxyPassMatch when
     plus in path). (Jakub Zelenka)
 
+- OpenSSL:
+  . Fixed LibreSSL undefined reference when OPENSSL_NO_ENGINE not set.
+   (David Carlier).
+
 - Phar:
   . Fixed bug #71465 (PHAR doesn't know about litespeed). (nielsdos)
 

ext/openssl/openssl.c

@@ -61,7 +61,7 @@
 #include <openssl/param_build.h>
 #endif
 
-#if OPENSSL_VERSION_NUMBER < 0x10100000L && !defined(OPENSSL_NO_ENGINE)
+#if (OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)) && !defined(OPENSSL_NO_ENGINE)
 #include <openssl/engine.h>
 #endif