This reverts commit 6d2019b965f4a3521b651f2cb9ef241dce29af55, as new caddy
has issues with tls certificate configuration:
https://github.com/mholt/caddy/issues/2588

About nxd-v0.11.5-4-g9d3151db:

 * not released yet functionality for regular expression cookie rewriting
   is available: https://github.com/mholt/caddy/pull/2144

 * not released yet functionality for ca_certifices in proxy:
   https://github.com/mholt/caddy/pull/2380

 * support for builtin log rotation disabling