New 'core'.

Signed-off-by: Roland Haeder <roland@mxchange.org>

diff --git a/core b/core
index 3b3947b86b38904aa1100b54846c14d3b31cb97d..57d9c524afef252f209990a35283970907890c03 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 3b3947b86b38904aa1100b54846c14d3b31cb97d
+Subproject commit 57d9c524afef252f209990a35283970907890c03