From 1912f39e7c024f2ee5c5ea618efdcbe92590b863 Mon Sep 17 00:00:00 2001
From: Kornel <kornel@geekhood.net>
Date: Sun, 22 Apr 2018 21:11:15 +0100
Subject: [PATCH] Update book submodule to pass linkchecker test

---
 src/doc/book | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/doc/book b/src/doc/book
index b889e1e30c5..6237a75790c 160000
--- a/src/doc/book
+++ b/src/doc/book
@@ -1 +1 @@
-Subproject commit b889e1e30c5e9953834aa9fa6c982bb28df46ac9
+Subproject commit 6237a75790cd2e0ca22961b55f64a83319e73464