moused(8): Add support for evdev protocol

The new daemon have following properties as compared with previous
incarnation:
- evdev protocol support for mices and touchpads. Additionally to
relative

moused(8): Add support for evdev protocol

The new daemon have following properties as compared with previous
incarnation:
- evdev protocol support for mices and touchpads. Additionally to
relative PS/2 and USB devices it enables console support for I2C/USB
touchpads and bluetooth mices.
- Other aged protocols like COM, raw PS/2 and X10 are dropped with only
exception of sysmouse. For those who still use them there is an
utility called msconvd(8).
- single daemon per system where hotplug is processed via devd socket.
Per device mode still supported too.
- Configuration and quirks files in libinput-compatible format.
Actually, the new moused config parser is taken from libinput.

The moused(8) can work in 2 modes:
1. Evdev support mode. It enables all previously mentioned devices.
It is enabled by deault.
2. Sysmouse support mode. All should work as before.
No new devices supported. To enable it add following lines to
/etc/rc.conf:
moused_port="/dev/psm0"
moused_nondefault_enable="YES"
One may add hw.usb.usbhid.enable=0 to /boot/loader.conf to enable
ums(4) driver which supports sysmouse protocol.

Differential Revision: https://reviews.freebsd.org/D52164

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