* Very simple fix for #1153

* Prevent  Caddy-Rewrite-Original-URI being added as  an HTTP ENV variable passed to FastCGI

part of fix for #1153

* Changes to Markdown to fix travis CI build.

#1955.2

* Revert "Changes to Markdown to fix travis CI build."

This reverts commit 4a018888395b7a90c57faf9ebb8ef04c4e6fe702.

* fail fast and fmt changes

* Create test for existance of Caddy-Rewrite-Original-URI header value #1153

* updated test comment

* const moved outside function so available to tests