NAME
	close_user - demote user object and close connection

SYNOPSIS
	void close_user()


DESCRIPTION
	Demotes the current user object (turning it into a regular
	persistent object) and closes its connection.

ERRORS
	An error will result if the object is not a user object or
	when this kfun is called from atomic code.

NOTES
	This kfun is only active when the network extensions are enabled.

SEE ALSO
	kfun/open_port, kfun/send_message, kfun/send_datagram,
	kfun/connect
