DottedAddr = AddrToString ( IPAddr )
||Numeric IP address (in network byte order)
||Dotted address string such as "127.0.0.1"
This method converts a 4-byte integer IP address to a dotted string address. It does
not perform a DNS lookup, so it returns immediately. It does not affect the Error property.
This method is provided for convenient handling of Addr in MxRec.