backup: fix vnstat path

Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>

config/backup/include

@@ -33,7 +33,7 @@
 /var/log/ip-acct/*
 /var/log/rrd/*
 /var/log/rrd/collectd
-/var/log/rrd/vnstat
+/var/log/vnstat
 /etc/sysconfig/firewall.local
 /etc/sysconfig/rc.local
 /root/.gitconfig

config/rootfiles/core/99/filelists/files

@@ -1,2 +1,3 @@
 etc/system-release
 etc/issue
+var/ipfire/backup/include