Bump the libusb major version due to the last commit, which changes the libusb 1.0 API. While at it, correct a manual page symlink.
Bump the libusb major version due to the last commit, which
changes the libusb 1.0 API. While at it, correct a manual
page symlink.

Suggested by:	kib @

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase