Using LPC Daemons
=================

If :do_login_command() returns a string, it is taken to be the name of an LPC
object to which the (unlogged-in) connection should be attached.

Let obj be the LPC object designated by the return value. obj->open() is
called immediately upon attaching the connection to the object.

For each line of input received from the connection, obj->receive_message()
will be called. To send output to the connection, call this_user()->notify()
per output line.

When the connection is broken, obj->close() will be called.

This mechanism is used to implement a hostname lookup daemon. A separate
process must connect to the server and authenticate itself with the database
such that "/lib/dns" is returned from :do_login_command(). LPMOO will then be
able to resolve hostnames and IP addresses (see ./dns-resolver for details).