Returns a connection index on success, or FALSE if the connection could not be
made. Opens a persistent connection to a Hyperwave server.
Each of the arguments should be a quoted string, except for
the port number. The
username and
password arguments are optional and can be left out.
In such a case no identification with the server will be
done. It is similar to identify as user anonymous. This
function returns a connection index that is needed by other
Hyperwave functions. You can have multiple persistent
connections open at once.
See also hw_connect().