The control panel doesn't check the format of the domain name, for example you can create a domain named "a/./" or "A...II."
The domain "a/./" result also impossible to delete after created.
After deleted test domain with no standard rules character, the folders are still in /opt/tinycp/domains
a a...ii. a...ii.. a..ii. a.ii. aa 'aaa"aa%' asd.ad.