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/adobe

@@ -48,7 +48,6 @@ authorxml.com
 businesscatalyst.com
 ccnsite.com
 ccpsx.com
-demdex.net
 dollarfotoclub.com
 dollarphotoclub.com
 dollarphotosclub.com
@@ -144,4 +143,5 @@ adobestats.io
 
 # Ads/tracking
 advertising.adobe.com @ads
+demdex.net @ads
 tubemogul.com @ads