* new function to set/delete options in external uci config files
* kresd: automated 'rpz_file' handling in /etc/config/resolver
* firewall: automated 'force_dns' handling if you
enable or disable adblock
* support sha256sum (default) and md5sum for blocklist
comparison & conditional dns restarts
* cosmetics
Signed-off-by: Dirk Brenken <dev@brenken.org>