========
Bugfixes.
+Libudev allows to subscribe to udev events. To prevent unwanted messages
+to be delivered, and waking up the subscribing process, a filter can be
+installed, to drop messages inside a kernel socket filter. The filters
+match on the <subsytem>:<devtype> properties of the device.
+ This is part of the ongoing effort to replace HAL, and switch current
+users over to directly use libudev, or for higher-level services use the
+specialized D-Bus interface of a DeviceKit service.
+ Libudev is still marked as experimental, and its interface might
+change if needed, but no major changes of the currently exported interface
+are expected anymore, and a first stable release should happen soon.
+
A too old kernel (2.6.21) or a kernel with CONFIG_SYSFS_DEPRECATED
is not supported since while and udevd will log an error message at
startup.