adblock: release 3.4.0

* preserve DNS cache after adblock processing,
  - 'unbound' and 'named' support this (please check readme)
  - 'dnsmasq' now uses the 'servers-file' directive
    to minimize the reload disruption,
    even though the dns cache will be cleared after SIGHUP
  - 'kresd' dns cache is persistent by upstream default, anyway
    Turris Omnia devices need a small upstream software change
    which is not accepted/implemented yet
* email notification in case of an error or domain count < n
  (default 0, check readme)
* removed securemecca from default config (service has been closed)
* new separate functions for hash compare and list/overall count
* add missing package dependencies
* various clean-ups
* update documentation

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

net/adblock/files/adblock.conf

@@ -126,12 +126,6 @@ config source 'reg_ru'
 	option adb_src_rset 'BEGIN{FS=\"[|^]\"}\$0~/^\|\|([[:alnum:]_-]+\.){1,}[[:alpha:]]+\^("\\\$third-party")?$/{print tolower(\$3)}'
 	option adb_src_desc 'focus on russian ads plus generic easylist additions, weekly updates, approx. 14.500 entries'
 
-config source 'securemecca'
-	option enabled '0'
-	option adb_src 'http://securemecca.com/Downloads/hosts.txt'
-	option adb_src_rset '\$0~/^127\.0\.0\.1[[:space:]]+([[:alnum:]_-]+\.){1,}[[:alpha:]]+([[:space:]]|$)/{print tolower(\$2)}'
-	option adb_src_desc 'broad blocklist, infrequent updates, approx. 13.700 entries'
-
 config source 'shalla'
 	option enabled '0'
 	option adb_src 'http://www.shallalist.de/Downloads/shallalist.tar.gz'