Add SPDX license tags

Signed-off-by: Steven Barth <steven@midlink.org>
batman-adv: Preserve configuration file on update

The configuration file of batman-adv should be marked as such to avoid that the
old configuration options are overwritten when it is upgraded.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Merge pull request #63 from ecsv/batadv-conffiles

batman-adv: Preserve configuration file on update
Maintainers: Update Simons email address

Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Merge branch 'master' of git://github.com/openwrt-routing/packages