Facilitate active nginx development

Rebuild nginx if the source files, or module source files, are newer than the nginx binary

Source state improvements

nginx config default should use the error.fifo

Force overwrite of /etc/init.d/nginx

Allow ppa install using development/mainline etc

Use nginx_map.default_group for group in all places

Fix support for os_family RedHat

Source install now works. Paths now configurable. Added init.d.

Installing nginx on Ubuntu/Debian fails, missing map property

Force symlink creation of /etc/init.d/nginx

support sysvinit scripts for the syslog forwarders

support the official nginx.org apt repo for debian users (at least)

the debian package installs the nginx service just fine, but the extra
fifo->syslog functionality would be nice to have under debian as well.

BUG: pkgrepo.absent, pkgrepo:watch_in(pkg), install_from_ppa

Revert "ENH: Add install_from_ppa pillar setting and PPA pkgrepo"

ENH: Add install_from_ppa pillar setting and PPA pkgrepo

Synchronized upstart script with the one recommended by nginx.

http://wiki.nginx.org/Upstart

Fixes #39.

This reverts commit f6ba9ddb59.

the nginx.ng formula is only compatible with the upcoming feature
release, as noted here:

https://github.com/saltstack-formulas/nginx-formula#nginxng

This argument is only currently available in develop, and thus does not
belong in this formula at this time.

Support http_realip module