Log Message:
sysutils/hw-probe: package revision.

# Changes

* Fix versioning.
  The script available on the BSD hardware database site tracks the master
  branch, so it's difficult to provide reliable distfiles without breaking
  checksums. Switching MASTER_SITES to the official github repo.
  This also allows to have consistent versioning.
* Let package to be installed also on Linux (supported).
* Simplify DESCR.
* Install documentation.