Enable to use the domain name informed in the 'map' field to be used as ...

...part of the directory name in the 'to' field

This modification will simplify adding multiple sites do Homestead by using these conventions:

- in the 'map' field add the domain name you want to use
- in the 'to' field, instead of using (ex.: Code), use the placeholder %domain%

If the 'to' field contains the placeholder, it will be replaced with the value of the 'map' field, otherwise it will default to it's current value