/status: show HTTP request headers and client IP.

Show the HTTP request headers and the client IP on the /status page.
This is for debugging request headers added by reverse proxies such as
Cloudflare and Nginx, and for making sure the client IP is correctly set
by the X-Forwarded-For header.

app/controllers/status_controller.rb

@@ -2,7 +2,7 @@ class StatusController < ApplicationController
   respond_to :html, :json, :xml
 
   def show
-    @status = ServerStatus.new
+    @status = ServerStatus.new(request)
     respond_with(@status)
   end
 end