Punycode URI normalization (#2370)

* Fix #2119 - Whenever about to send a HTTP request, normalize the URI

* Add test for IDN request in FetchLinkCardService

* Perform IDN normalization on domains before they are stored in the DB

app/services/fetch_remote_status_service.rb

@@ -31,7 +31,7 @@ class FetchRemoteStatusService < BaseService
   end
 
   def extract_author(url, xml)
-    url_parts = Addressable::URI.parse(url)
+    url_parts = Addressable::URI.parse(url).normalize
     username  = xml.at_xpath('//xmlns:author/xmlns:name').try(:content)
     domain    = url_parts.host