adblock: release 2.3.0

* automatically selects dnsmasq or unbound as dns backend
* add the new 'adguard' source, a combined/quite effective block list
* remove needless dns backend restarts
* optimize adblock restart behavior
* optimize block list processing on inotify enabled filesystems
* better return code checking on block list download
* fix boot function/startup on Chaos Calmer
* fix a bug in blocklist removal function
* add more (optional) debug output
* move backup options to global config
* documentation update

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

net/adblock/files/adblock.init

@@ -13,21 +13,23 @@ adb_script="/usr/bin/adblock.sh"
 
 boot()
 {
-    local wanif4 wanif6
+    local wanif4 wanif6 cnt=0
 
-    ubus -t 30 wait_for network.interface
-    if [ ${?} -eq 0 ]
-    then
-        . "/lib/functions/network.sh"
+    . "/lib/functions/network.sh"
+    while [ ${cnt} -le 30 ]
+    do
         network_find_wan wanif4
         network_find_wan6 wanif6
-        if [ -n "${wanif4}" ] || [ -n "${wanif6}" ]
+        if [ -n "${wanif4}" ] || [ -n "${wanif6}" ] || [ ${cnt} -eq 30 ]
         then
             rc_procd start_service
             return 0
+        else
+            sleep 1
+            cnt=$((cnt+1))
+            network_flush_cache
         fi
-    fi
-    rc_procd service_triggers
+    done
 }
 
 start_service()
@@ -54,6 +56,11 @@ stop_service()
     rc_procd "${adb_script}" stop
 }
 
+restart()
+{
+    rc_procd start_service restart
+}
+
 suspend()
 {
     rc_procd start_service suspend