2 ways:
- Use a custom vhost entry for the sub domain
- Use a .htaccess file in the sub domain's root folder
1. Log in as zadmin and navigate to Admin > Module Admin > Apache Config > Virtualhost Override > [select sub domain] > Custom Entry:
Code:
# REDIRECT SUB.DOMAIN to DOMAIN/SUB FOLDER
Redirect / http://domain.tld/sponsors
2. Create a .htaccess file in the sub domain's root folder with the following contents:
Code:
Redirect / http://domain.tld/sponsors
1 is the recommended way, but I am not sure if it will work with the other directives in the vhost for the sub domain.
2 may be your best bet.