Add a naming requirement for the DLE server name "project name"
Issue: #534 (comment 1501040954)
Please add a naming requirement for the server name "project name". Must be a match of regex '[a-z](?:[-a-z0-9]{0,61}[a-z0-9])?|[1-9][0-9]{0,19}'
names must be lowercase and alphanumeric.
Edited by Vitaliy Kukharik