Method to Get the address in a format usable with an http url.
The format of %NetworkAddress is address_"|"_port, while the address required
for a url is address_":"_port. Furthermore, if the address is an IPV6 colon separated
hex representation, the address must be enclosed with .
Inherited description: Tests if the logical value %val, which is a string, is valid.
The validation is based on the class parameter settings used for the class attribute this data type is associated with.
In this case, MINLEN, MAXLEN, VALUELIST, and PATTERN.