New 'core'.

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

diff --git a/core b/core
index d4a8a783029f708b1d67b44557b5387017bdd63f..6e9f737ce5f06521062b858c32ff1175cf51f4c1 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit d4a8a783029f708b1d67b44557b5387017bdd63f
+Subproject commit 6e9f737ce5f06521062b858c32ff1175cf51f4c1