[York.edu] Add subdomains and reactivate ruleset (EFForg#9911)

* [York.edu] Add subdomains

* [York.edu] Reactivate ruleset

* Rename York.xml to York.edu.xml

src/chrome/content/rules/York.edu.xml

@@ -0,0 +1,34 @@
+<!--
+	Invalid certificate:
+		york.edu
+
+	Private subdomain:
+		ecampus.york.edu
+
+	No working URL known:
+		remote.york.edu
+
+	Secure connection failed:
+		mail.york.edu
+
+-->
+<ruleset name="York College of Nebraska">
+
+	<target host="york.edu" />
+	<target host="www.york.edu" />
+	<target host="auth.york.edu" />
+	<target host="cats.york.edu" />
+	<target host="koha.york.edu" />
+	<target host="library.york.edu" />
+	<target host="online.york.edu" />
+	<target host="panthernet.york.edu" />
+	<target host="smtp.york.edu" />
+	<target host="yorkjics-test.york.edu" />
+
+	<rule from="^http://york\.edu/" 
+		to="https://www.york.edu/"/>
+
+	<rule from="^http:"
+		to="https:" />
+
+</ruleset>