Enable coin.space.xml (#19892)

* Enable coin.space.xml

* Add comment for coin.space.xml rule

Author: mahnunchik

src/chrome/content/rules/coin.space.xml

@@ -1,16 +1,15 @@
-
 <!--
-Disabled by https-everywhere-checker because:
-Fetch error: http://ru.coin.space/ => https://ru.coin.space/: (6, 'Could not resolve host: ru.coin.space')
-
+	coin.space uses a subdomain for every cryptocurrency
+	so it is required the wildcard rule.
+	Subdomains can be added and removed at any time
+	for example in case of emergency fork of cryptocurrency.
 -->
-<ruleset name="coin.space" default_off="failed ruleset test">
+<ruleset name="coin.space">
 	<target host="coin.space" />
-	<target host="www.coin.space" />
-	<target host="db.coin.space" />
-	<target host="live.coin.space" />
-	<target host="proxy.coin.space" />
-	<target host="ru.coin.space" />
+	<target host="*.coin.space" />
+	<test url="http://www.coin.space/" />
+	<test url="http://xrp.coin.space/api/v1/" />
+	<test url="http://xlm.coin.space/api/v1/" />
 
 	<rule from="^http:" to="https:" />
 </ruleset>