Create mastodon.cloud ruleset (#19176)

Issue #18046

Author: ShenZhouHong

src/chrome/content/rules/Mastodon.cloud.xml

@@ -0,0 +1,23 @@
+<!--
+	Nonfunctional hosts in *.mastodon.cloud:
+	assets.mastodon.cloud (t)
+	mail.mastodon.cloud (t)
+	s3.mastodon.cloud (t)
+	status.mastodon.cloud (t)
+	www.mastodon.cloud (t)	
+
+	h: http redirect
+	m: certificate mismatch
+	r: connection refused
+	s: self-signed certificate
+	t: timeout on https
+-->
+<ruleset name="Mastodon.cloud">
+	<target host="mastodon.cloud" />
+	
+	<target host="media.mastodon.cloud" />
+	
+	<securecookie host=".+" name=".+" />
+
+	<rule from="^http:" to="https:" />
+</ruleset>