uhubctl 2.1.0

Many fixes and improvements since version 2.0.0.
Added more supported devices into device table.
Most important changes:

1961aa0 Add explicit workaround for USB device not removed after port power down on Linux
5db2487 Add support for NetBSD
945d08e Add FAQ
a510d09 Implemented reading ContainerID from BOS descriptor to detect USB2/3 dual devices
e93d1a0 Use version from VERSION file if git describe fails
fc7aabb Support fractional seconds for delay
00d1a40 Fix build on FreeBSD
c237ec1 Add explanation how to configure Linux USB udev permissions
343e02b Improve USB2/3 duality handling
0432087 Add support for comma separated list of ranges to port list parser
2de7def Improve USB3 support
2311a1c Fixed displaying duplicate hubs in status output