fix references to https for listbooru

app/logical/image_proxy.rb

@@ -22,7 +22,7 @@ class ImageProxy
       "User-Agent" => "#{Danbooru.config.safe_app_name}/#{Danbooru.config.version}"
     }
 
-    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, headers)
       if resp.is_a?(Net::HTTPSuccess)
         return resp

app/models/saved_search.rb

@@ -117,7 +117,7 @@ class SavedSearch < ActiveRecord::Base
       uri = URI.parse("#{Danbooru.config.listbooru_server}/users")
       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)
           resp.body