HTTP_HOST should be made lowercase as one cannot guarantee that it always is (most browsers do this, but not all) - in which case the wrong config will be loaded
Update config/config.master.php

There was no reason to include the '/' with admin.php because it is already a part of base_url (see line 102).

This was resulting in a double '//' in the CP.
Customized for 1524 use with our own custom configs.
convert all tabs to spaces.
Flattened file structure, deleted local.config.php & added it to .gitignore, deleted default readme and added a custom one