Clean up ad domains (#3915)

* adobe: update demdex.net

* mastercard: remove nab (national australia bank) domains

* 36kr: add adx.36kr.com with ads attr

* category-ads-all: include addthis

all addthis domains are listed in easyprivacy

* category-ads: remove cdn.advertserve.com and ad.unimhk.com

advertserve.com and unimhk.com are listed in category-ads-all

* category-ads: remove unreliable ad domains

None of them are listed in easylist/easyprivacy/easylistchina

data/mastercard

@@ -200,6 +200,3 @@ travelexmoneycard.com
 # World Currency Card
 bidvestbank.co.za
 worldcurrencycard.co.za
-
-full:nab.demdex.net
-full:nationalaustraliaban.tt.omtrdc.net