when adding a domain there is no domain validation

[elypter]

you could either use urlparse() or a regex from
http://stackoverflow.com/questions/3026957/how-to-validate-a-domain-name-using-regex-php

[Jaxkr]

Yeah, I used to use a regex but it was broken so I temporarily disabled it. 7d76b4d

It was failing on long fancy new TLDs like .travel and .museum. Will re-enable soon.