a patch for IRSSI to prevent errors when compiling with LibreSSL 2.7.0/2.7.1

Also here, submitted upstream as a pull request now merged upstream.

Grabbed from here.

Works with irssi 1.1.1 and git master:

--- a/src/core/network-openssl.c
+++ b/src/core/network-openssl.c
@@ -35,7 +35,8 @@
 #include <openssl/err.h>
 
 /* OpenSSL 1.1.0 introduced some backward-incompatible changes to the api */
-#if (OPENSSL_VERSION_NUMBER >= 0x10100000L) && !defined(LIBRESSL_VERSION_NUMBER)
+#if (OPENSSL_VERSION_NUMBER >= 0x10100000L) && \
+    (!defined(LIBRESSL_VERSION_NUMBER) || LIBRESSL_VERSION_NUMBER < 0x2070000fL) /* The two functions below could be already defined if OPENSSL_API_COMPAT is * below the 1.1.0 version so let's do a clean start */ #undef X509_get_notBefore @@ -47,7 +48,8 @@ /* OpenSSL 1.1.0 also introduced some useful additions to the api */ #if (OPENSSL_VERSION_NUMBER >= 0x10002000L)
-#if (OPENSSL_VERSION_NUMBER < 0x10100000L) || defined (LIBRESSL_VERSION_NUMBER)
+#if (OPENSSL_VERSION_NUMBER < 0x10100000L) || \
+    (defined (LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER < 0x2070000fL)
 static int X509_STORE_up_ref(X509_STORE *vfy)
 {
     int n;