Make recaptcha optional on signup page.

app/controllers/users_controller.rb

@@ -44,7 +44,7 @@ class UsersController < ApplicationController
   def create
     @user = User.new(params[:user], :as => CurrentUser.role)
     @user.last_ip_addr = request.remote_ip
-    if verify_recaptcha(model: @user)
+    if !Danbooru.config.enable_recaptcha? || verify_recaptcha(model: @user)
       @user.save
       if @user.errors.empty?
         session[:user_id] = @user.id

app/views/users/new.html.erb

@@ -15,7 +15,11 @@
         <%= f.input :password %>
         <%= f.input :password_confirmation %>
 
-        <%= invisible_recaptcha_tags callback: 'submitInvisibleRecaptchaForm', text: 'Sign up' %>
+        <% if Danbooru.config.enable_recaptcha? %>
+          <%= invisible_recaptcha_tags callback: 'submitInvisibleRecaptchaForm', text: 'Sign up' %>
+        <% else %>
+          <%= f.submit "Sign up", :data => { :disable_with => "Signing up..." } %>
+        <% end %>
       <% end %>
     </div>
   </div>