After careful consideration and try and fail/success scenarios, I concluded that:
http://mydomain:12026/cal.php
url should be redirected to
http://mydomain:12026/
Usually the above move can be done with a .htaccess file with:
RewriteEngine on RewriteRule ^ cal.php [L]
This will redirect all traffic and cripple your admin/index.php page from baikal.