Pull upload notice, bookmarklet notice from help:upload_notice wiki page.

app/controllers/uploads_controller.rb

@@ -5,6 +5,7 @@ class UploadsController < ApplicationController
 
   def new
     @upload = Upload.new
+    @upload_notice_wiki = WikiPage.titled(Danbooru.config.upload_notice_wiki_page).first
     if params[:url]
       @normalized_url = params[:url]
       headers = default_headers()

app/views/uploads/new.html.erb

@@ -4,22 +4,13 @@
 
     <% if CurrentUser.can_upload? %>
       <div id="upload-guide-notice">
-        <p><strong>Before uploading, please read the <%= link_to "how to upload guide", wiki_pages_path(:title => "howto:upload") %></strong>.
-        If you plan to upload your own art, you should read <%= Danbooru.config.app_name %>'s
-        <%= link_to "specific policy guidance", wiki_pages_path(:title => "howto:upload", :anchor => "dtext-self-upload") %>
-        first. More suitable sites to uploading your own artwork include DeviantArt, Tumblr, Twitter, Pixiv, etc.</p>
+        <%= format_text(@upload_notice_wiki.body) %>
       </div>
 
       <% unless CurrentUser.can_upload_free? %>
         <p>You can upload <strong><%= pluralize CurrentUser.upload_limit, "more post" %></strong> today.</p>
       <% end %>
 
-      <% if params[:url].blank? %>
-        <div id="bookmarklet-notice">
-          <p><span style="font-weight: bold;">You should be using Danbooru's official <%= link_to "upload bookmarklet", bookmarklet_path %> to upload!</span> It makes uploading more convenient and does several things for you automatically such as fixing incorrect sources and optionally copying the artist's commentary.</p>
-        </div>
-      <% end %>
-
       <%= render "image" %>
       <%= render "post", :post => @post %>
       <%= render "sources/info", :source => @source %>

config/danbooru_default_config.rb

@@ -241,6 +241,10 @@ module Danbooru
       nil
     end
 
+    def upload_notice_wiki_page
+      "help:upload_notice"
+    end
+
     # The number of posts displayed per page.
     def posts_per_page
       20