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/36kr

@@ -2,3 +2,6 @@
 36kr.com
 36krcdn.com
 36krcnd.com
+
+# Ads
+adx.36kr.com @ads