Source: Me
Reason: fix build with libressl
Upstream: No, notified https://github.com/haiwen/ccnet/issues/122

--- a/lib/rsa.c  2017-05-28 03:23:49.499297000 +0200
+++ b/lib/rsa.c       2017-05-28 03:34:19.755854000 +0200
@@ -13,7 +13,7 @@

 /* Forward compatibility functions if libssl < 1.1.0. */

-#if OPENSSL_VERSION_NUMBER < 0x10100000L
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)

 int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d)
 {