Log Message:
Update xbattbar to 1.4.2nb3 by adding support for ACPI - if APM
doesn't work, try to use ACPI to get the battery charge value, and AC
charging switch.

Known to work on my Sony VAIO (PCG-GRX315MP) with ACPI, and with thanks to:
	Lubomir Sedlacik for testing on an IBM T22 with ACPI
	Manuel Bouyer for testing on an IBM Thinkpad 600e with APM, and
	Brian A. Seklecki for testing on a Sony PCG-R505