[packages] tinc: The initscript for tinc writes a temporary config into /tmp/tinc.

In the prepare_net function it appends flags and params from the uci config to
the temporary tinc.conf for each net. These values are appended to the
config file on each /etc/init.d/tinc restart and the file grows. By
removing all old temporary config this problem is solved. Then we should
also remove the temporary config for a net which is stopped to free up
some bytes in memory.
Contribution from Manuel Munz <freifunk@somakoma.de>

git-svn-id: svn://svn.openwrt.org/openwrt/packages@35053 3c298f89-4303-0410-b956-a3cf2f4a3e73

net/tinc/files/tinc.init

@@ -135,6 +135,9 @@ prepare_net() {
 
 	section_enabled "$s" || return 1
 
+        # rm old config
+        rm -rf "$TMP_TINC/$s/"
+
 	[ ! -d "$TMP_TINC/$s" ] && mkdir -p "$TMP_TINC/$s"
 	[ -d "/etc/tinc/$s" ] && cp -r "/etc/tinc/$s" "$TMP_TINC/"
 
@@ -179,6 +182,8 @@ stop_instance() {
 
 	SERVICE_PID_FILE="/var/run/tinc.$s.pid"
 	service_stop $BIN
+	# rm old config
+	rm -rf "$TMP_TINC/$s/"
 }
 
 reload_instance() {