anchor.diff:  
   go-camo is a go version of a https://github.com/atmos/camo[camo] server.
   
  -A camo server is a special type of image proxy that proxies non-secure images over SSL/TLS, in order to prevent mixed content warnings on secure pages.
  -The server works in conjunction with back-end code that rewrites image URLs and signs them with an {link-hmac}.
  +A camo server is a special type of image proxy
  +that proxies non-secure images over SSL/TLS,
  +in order to prevent mixed content warnings on secure pages.
  +The server works in conjunction with back-end code
  +that rewrites image URLs and signs them with an {link-hmac}.
   
   == How it works
   
  
positive.code: 
  === url-tool
  
  The `url-tool` utility provides a simple way to generate signed URLs from the command line.
  
  [source,text]
  ----
  
negative.code: More generally, it is recommended to either:
  
  *   Run go-camo on an isolated instance (physical, vlans, firewall rules, etc).
  *   Run a local resolver for go-camo that returns NXDOMAIN responses
      for addresses in blacklisted ranges (e.g. unbound's `private-address` functionality).
      This is also useful to help prevent dns rebinding in general.
  
  == Configuring
  
  