adblock: update 1.1.16

* new config option 'adb_restricted' to disable updates of the adblock
config during runtime (no flash writes, disabled by default)
* new update function, to apply latest configuration changes if needed
(/etc/init.d/adblock cfgup)
* fix dns redirect rule
* various optimizations

Signed-off-by: Dirk Brenken <dev@brenken.org>

net/adblock/files/adblock.conf

@@ -7,7 +7,6 @@ config adblock 'global'
 	option adb_whitelist '/etc/adblock/adblock.whitelist'
 	option adb_whitelist_rset '\$1 ~/^([A-Za-z0-9_-]+\.){1,}[A-Za-z]+/{print tolower(\$1)}'
 	option adb_forcedns '1'
-	option adb_dnstoggle 'on'
 
 config service 'backup'
 	option enabled '0'