Do not write tunneldigger conf on flash

Fixes: #41

Signed-off-by: Robert Langhammer <rlanghammer@web.de>
Reviewed-by: Tobias Klaus <tk+ff@meskal.net>
Tested-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

src/packages/fff/fff-tunneldigger/files/etc/uci-defaults/55_fff-tunneldigger

@@ -1,2 +1,3 @@
 /etc/init.d/tunneldigger disable
->/etc/config/tunneldigger
+rm /etc/config/tunneldigger
+ln -s /tmp/tunneldigger /etc/config/

src/packages/fff/fff-vpn-select/files/usr/sbin/vpn-select

@@ -29,7 +29,7 @@ for file in $filecounts; do
         uci set tunneldigger.$count.interface="l2tp$count"
         uci set tunneldigger.$count.enabled="1"
         uci set tunneldigger.$count.hook_script='/etc/tunneldigger/tunneldigger.hook'
-        uci commit tunneldigger
+        uci -c /tmp commit tunneldigger
         count=$((count + 1))
         # remove this fastd-peer
         rm /etc/fastd/${project}/peers/$file