ExecStartPre has nginx -t to test the Nginx config before starting
the service initially but ExecReload will just issue an Nginx reload
without testing the config first. If the config ends up being bad
this takes Nginx down. Perform a config test before reloading and if
that fails leave Nginx running on the previous config in RAM.

Build NGINX from source with nginx.ng state with support for passing
compile time flags necessary for installing modules such as more headers
by the openresty project.

This is crap but configuration for http scope cannot be both ordered and
merged from map.jinja it seems, see issue #40.

this is needed on archlinux where the pid file is set by systemd
not the nginx.conf file.

In the pillar file you just add
  pid:

an value of 'None' and no pid entry in nginx.conf.
this now works with every None value set in the pillar file