reference 3rdparty branch with SabreDAV 1.7.9 installed using composer

diff --git a/3rdparty b/3rdparty
index 42efd966284debadf83b761367e529bc45f806d6..0faf6063ac55d3bc82d2a781548ad0f00e77360c 160000 (submodule)
--- a/3rdparty
+++ b/3rdparty
@@ -1 +1 @@
-Subproject commit 42efd966284debadf83b761367e529bc45f806d6
+Subproject commit 0faf6063ac55d3bc82d2a781548ad0f00e77360c