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/category-ads-all

@@ -1,6 +1,7 @@
 # This file contains domains of all ads providers, including both the domains that serves ads, and the domains of providers themselves.
 include:category-ads
 
+include:addthis
 include:adjust
 include:clearbit
 include:growingio
@@ -23,7 +24,6 @@ adview.cn @ads
 casalemedia.com @ads
 contextual.media.net @ads
 cpmstar.com @ads
-demdex.net @ads
 httpool.com @ads
 lijit.com @ads
 mfadsrvr.com @ads