Relax kernel sysctl options for sysrepo & netopeer2-server

Change-Id: Ia600426aac3e0c06963413838137d1e13e8e0be8
diff --git a/board/czechlight/common/overlay/usr/lib/sysctl.d/66-sysrepo-disable-fs-protected_regular.conf b/board/czechlight/common/overlay/usr/lib/sysctl.d/66-sysrepo-disable-fs-protected_regular.conf
new file mode 100644
index 0000000..3bf5f90
--- /dev/null
+++ b/board/czechlight/common/overlay/usr/lib/sysctl.d/66-sysrepo-disable-fs-protected_regular.conf
@@ -0,0 +1,6 @@
+# Make sure that systemd's and kernel's settings still allow other users to
+# access sysrepo SHM files
+# Bug: https://github.com/sysrepo/sysrepo/issues/2080
+#
+# Also allow access to netopeer2-server's AF_UNIX socket
+fs.protected_regular = 0