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.conf

@@ -6,10 +6,8 @@ config adblock 'global'
 	option adb_debug '0'
 	option adb_whitelist '/etc/adblock/adblock.whitelist'
 	option adb_whitelist_rset '\$1 ~/^([A-Za-z0-9_-]+\.){1,}[A-Za-z]+/{print tolower(\"^\"\$1\"\\\|[.]\"\$1)}'
-
-config service 'backup'
-	option enabled '0'
-	option adb_dir '/mnt'
+	option adb_backup '0'
+	option adb_backupdir '/mnt'
 
 config source 'adaway'
 	option enabled '1'
@@ -17,6 +15,12 @@ config source 'adaway'
 	option adb_src_rset '\$0 ~/^127\.0\.0\.1[ \t]+([A-Za-z0-9_-]+\.){1,}[A-Za-z]+/{print tolower(\$2)}'
 	option adb_src_desc 'focus on mobile ads, infrequent updates, approx. 400 entries'
 
+config source 'adguard'
+	option enabled '0'
+	option adb_src 'https://raw.githubusercontent.com/AdguardTeam/AdguardDNS/master/Filters/filter.txt'
+	option adb_src_rset '{FS=\"[|^]\"} \$0 ~/^\|\|([A-Za-z0-9_-]+\.){1,}[A-Za-z]+\^$/{print tolower(\$3)}'
+	option adb_src_desc 'combined adguard dns filter list, approx. 12.000 entries'
+
 config source 'blacklist'
 	option enabled '0'
 	option adb_src '/etc/adblock/adblock.blacklist'