Add two more data types to streamhost.pp
Add two more data types to streamhost.pp

Data types have been added to `raw_prepend` and `raw_append`.

The docs say strings or arrays of strings.
Defaults have been changed from `undef` to `[]`.

The tempate casts using `Array($raw_prepend)`.
Previously, (when the default was `undef`), the template would cast
`nil` into an empty array.

jfryman/puppet-nginx,voxpupuli/puppet-nginx,jfryman/puppet-nginx,voxpupuli/puppet-nginx