Tikiwiki has been installed into /var/www/tikiwiki

You should point this to the DocumentRoot of your web-server:
 # ln -s ../tikiwiki /var/www/htdocs/tikiwiki
(make sure you use a relative symlink since Apache is chrooted)

Make sure you read /var/www/tikiwiki/README.OpenBSD then complete the
installation by accessing:
http://<hostname>/tikiwiki/tiki-install.php
