anchor.diff:  *   more performant stats (replaced mutex with sync/atomic)
   *   fewer spawned goroutines when using stats
   
  -== 1.0.5 - 2016-02-18
  +== v1.0.5 - 2016-02-18
   
   *   Build release with go1.6
   *   Switch to building with gb
   
  -== 1.0.4 - 2015-08-28
  +== v1.0.4 - 2015-08-28
   
   *   Minor change for go1.5 with proxy timeout 504
   
  -== 1.0.3 - 2015-04-25
  +== v1.0.3 - 2015-04-25
   
   *   revert to stdlib http client
   
  -== 1.0.2 - 2015-03-08
  +== v1.0.2 - 2015-03-08
   
   *   fix issue with http date header generation
   
  -== 1.0.1 - 2014-12-16
  +== v1.0.1 - 2014-12-16
   
   *   optimization for allow-list checks
   *   keepalive options fix
   
  -== 1.0.0 - 2014-06-22
  +== v1.0.0 - 2014-06-22
   
   *   minor code organization changes
   *   fix for heroku build issue with example code
   
  -== 0.6.0 - 2014-06-13
  +== v0.6.0 - 2014-06-13
   
   *   use simple router instead of gorilla/mux to reduce overhead
       and increase performance.
   *   move some code from camo proxy into the simple router
   
  -== 0.5.0 - 2014-06-02
  +== v0.5.0 - 2014-06-02
   
   *   some minor changes to Makefile/building
   *   add support for HTTP HEAD requests
  
positive.code: *   Use new flag parsing library for nicer help and cleaner usage.
  *   Specify a fallback accept header if none is provided by client.
  
  == 0.0.4 - 2012-09-02
  
  *   Refactor Stats code out of camoproxy
  *   Make stats an optional flag in go-camo
  *   Minor documentation cleanup
  *   Clean up excessive logging on client initiated broken pipe
  
  == 0.0.3 - 2012-08-05
  
  *   organize and clean up code
  *   make header filters exported
  
negative.code: *   upgrade library deps
  *   various bug fixes
  
  == v0.4.0 - 2014-05-23
  
  *   remove config support (use env or cli flags)
  *   turn allowlist into a cli flag to parse a plain text file vs json config
  *   clean ups/general code hygiene
  
  == v0.3.0 - 2014-05-13
  
  *   Transparent base64 url support
  
  == v0.2.0 - 2014-04-17
  
  *   Remove NoFollowRedirects and add MaxRedirects
  *   Use https://github.com/mreiferson/go-httpclient to handle timeouts more
      cleanly
  
  == v0.1.3 - 2013-06-24
  
  *   fix bug in loop prevention
  *   bump max idle conn count
  *   keep idle conn trimmer running
  
  == v0.1.2 - 2013-03-30
  
  *   Add ReadTimeout to http.Server, to close excessive keepalive goroutines
  
  == v0.1.1 - 2013-02-27
  
  *   optimize date header generation to use a ticker
  *   performance improvements
  *   fix a few subtle race conditions with stats
  
  == v0.1.0 - 2013-01-19
  
  *   Refactor logging a bit
  *   Move encoding functionality into a submodule to reduce import size (and
  