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Kernel patch [1] fixed bugs in rfkill handling on MSI Wind U100. Now that the HW rfkill reports the correct state, and the SW rfkill is controllable from userspace, it's necessary to mute KEY_WLAN and KEY_BLUETOOTH generated on HW rfkill state changes. Otherwise, the userspace will react to these keys and toggle the SW rfkill as well, which is not desired, because the user may end up with non-functional radios if HW and SW rfkills are out of sync. Blocking these keycodes doesn't impair user experience, because the desktop environment can still react to HW rfkill events and act accordingly (for example, show notifications). While at it, use "unknown" instead of "reserved" to mute keys, to avoid the "atkbd serio0: Unknown key pressed" flood in dmesg. [1]: https://lore.kernel.org/all/20230721145423.161057-1-maxtram95@gmail.com/
Files in this directory specify a description of hardware devices, in the form of mappings from modalias-like keys (which identify specific hardware devices) to udev properties. Files in this directory are not read by udev directly. Instead, man:systemd-hwdb(8) compiles them into a binary database. See man:hwdb(7) for an overview of the configuration file format, and man:systemd-udevd.service(8) for a description of the udev daemon. Use 'systemd-analyze cat-config udev/hwdb.d' to display the effective config.