fix for iqdb download

app/logical/iqdb/download.rb

@@ -28,7 +28,7 @@ module Iqdb
         uri = URI.parse("#{Danbooru.config.iqdbs_server}/similar")
         uri.query = URI.encode_www_form(params)
 
-        Net::HTTP.start(uri.host, uri.port) do |http|
+        Net::HTTP.start(uri.host, uri.port, :use_ssl => uri.is_a?(URI::HTTPS)) do |http|
           resp = http.request_get(uri.request_uri)
           if resp.is_a?(Net::HTTPSuccess)
             json = JSON.parse(resp.body)