update iqdb after post replacements (#3885)

script/fixes/055_reindex_replacements_in_iqdb.rb

@@ -0,0 +1,14 @@
+#!/usr/bin/env ruby
+
+require File.expand_path(File.join(File.dirname(__FILE__), '..', '..', 'config', 'environment'))
+
+CurrentUser.user = User.system
+CurrentUser.ip_addr = "127.0.0.1"
+
+PostReplacement.where("created_at > ?", 6.months.ago).find_each do |pr|
+  post = pr.post
+  if post.has_preview?
+    puts "queuing for #{post.id}"
+    Post.iqdb_sqs_service.send_message("update\n#{post.id}\n#{post.preview_file_url}")
+  end
+end