fix: readded SSL_INC_PREFIX

include/common.h.in

@@ -32,7 +32,7 @@
 #include <@SSL_INC_PREFIX@@SSL_HDR@>
 # ifdef SSL_TYPE_openssl
 #	 if OPENSSL_VERSION_NUMBER < 0x10100000
-#	  include <openssl/engine.h>
+#	  include <@SSL_INC_PREFIX@engine.h>
 #	 endif
 #  include <@SSL_INC_PREFIX@err.h>
 #  include <@SSL_INC_PREFIX@rand.h>