Remove extra reload command
Combine calls to restart nginx into a single command
one-liner
Remove extra dash
Use a template to create an application's nginx.conf
Allow overriding of the nginx.conf template via nginx.conf.template
Implement the ability to set multiple server names for a given application

Adding a hostname to the $APP/VHOST file will enable it as a virtualhost for the application.

In addition, any hostname set that matches an associated ssl certificate will also be set as an ssl host. Note that if a hostname does not have a matching SSL host, then it will result in an erroring application.

For the moment, running `dokku url` on an app may not correctly display the current hostnames for said app.
Add domains plugin as written in https://github.com/jtangelder/dokku-nginx-alt

This plugin conforms to the heroku api for setting and removing domains. Note that it does not yet update the URL file for a given application.
Move VHOST file creation to a single domains:setup command

This helps remove duplication and also ensures that all hosts have a proper setup after running `make copyfiles`

Note that this command is not exposed in help as it is not generally useful to developers
Add missing env var
Use a normal conditional
Fix test for file
Fix issue where VHOST was not properly being set

The URL file is being rewritten on every deploy by `dokku deploy` and thus that file was incorrect. Instead, we just reuse the old logic from the nginx-vhosts plugin to handle creation of the VHOST file
Delete the VHOST file, not the URL file, when NO_VHOST is set

The URL file is useful for understanding what port docker decided to host our app internally on.
Use a one-liner for the "Configuring" echo statement
Do not overwrite URL file
Use updated VHOST file instead of URL file when outputting the current URL to an app

Note that this may include more than one URL to an app
Output *all* hosts on multiple lines
Use sed to indent output of `dokku url` command
Add backup export/import hooks for associated VHOST files