Minor hidraw fixes

• Make FreeBSD hidraw driver interoperable with hid-tools.
• Use loader tunable to turn HID-over-USB support on/off instead of choosing it at build time.

Sync with 13-STABLE

Minor bugfixes:
hms: Filter out idle cursor drift in sampling mode
hconf: Do not fetch report before writing new usage values back.

Fix build on recent CURRENT and STABLE

• Fix build on recent CURRENT and STABLE after r368774
• Experemental driver for Elan I2C touchpads
• Mostly matches https://reviews.freebsd.org/D27777

Release 0.0.3

Add support for PlayStation4 DualShock4 controller
Add support for surface and buttons touchpad switches (by @avg-I)

Release 0.0.2

Most important changes:

• USB transport backend is stable enough now. It is enabled by default with greater priority than OS drivers have.
• hcons - Consumer page AKA Multimedia keys and hsctrl - System control page AKA Power keys drivers are added. They should replace sysutils/uhidd port that became unusable since recent X11 switchover to evdev.
• hidraw driver. It exports raw HID data in uhid(4) and Linux hidraw-compatible way.