D7: Validate Hostname field value is a valid hostname

PR with basic checks: https://github.com/quantcdn/drupal/pull/164

Note that trying dns_get_record was problematic since there can be a DNS record for www.example.com but not example.com yet both are probably fine since one should redirect to the other.

Not sure what other checks might be good.

Kristen Pol → credited steveworley → .

Merged to GitHub. Will be in the next release.

Included in the 7.x-1.2 release → .