Support internal locations

[jarshwah]

To use sendfile (http://wiki.nginx.org/X-accel) one has to have a location that looks like:

  location /protected {
    internal;
    alias /path/to/protected/files;
  }

The problem is that I can't find a way to set the "internal" directive. I tried:

  vhost_protected:
    location: '/protected'
    location_alias: '/path/to/protected/files'
    vhost: 'vhost'
    location_cfg_prepend:
      internal: ''

But I believe the empty value for internal means it's just not getting rendered in the template. Am I doing something wrong, or is having empty values an oversight?

[rabbitt]

@jarshwah can you give the new functionality added in #351 a try and, if it suits your needs, close this ticket ?

[3flex]

The PR looked good, I'm going to assume this can be closed. @jarshwah let us know if there's anything else you need here.