LazyUnitOrDomainCheck
Performs a superficial check for the validity of "unitOrDomain" as a unit or a domain. ;Superficial' means that it only checks "unitOrDomain" for invalid characters. The function returns the empty word on success.
Usage:
inst LazyUnitOrDomainCheck unitOrDomain
Parameters:
unitOrDomain
The unit or domain to check for invalid characters.
Result:
An empty string on success.