+ /**
+ * Initiate DNS lookup. Your class should not attempt to delete or free these
+ * objects, as the core will do this for you. They must always be created upon
+ * the heap using new, as you cannot be sure at what time they will be deleted.
+ * Allocating them on the stack or attempting to delete them yourself could cause
+ * the object to go 'out of scope' and cause a segfault in the core if the result
+ * arrives at a later time.
+ * @param source The IP or hostname to resolve
+ * @param forward Set to true to perform a forward lookup (hostname to ip) or false
+ * to perform a reverse lookup (ip to hostname). Lookups on A records and PTR
+ * records are supported. CNAME and MX are not supported by this resolver.
+ * @param dnsserver This optional parameter specifies an alterate nameserver to use.
+ * If it is not specified, or is an empty string, the value of ServerConfig::DNSServer
+ * is used instead.
+ * @throw ModuleException This class may throw an instance of ModuleException, in the
+ * event there are no more file descriptors, or a similar hard error occurs such as
+ * the network being down.
+ */