Make wpapsk-opencl choose vector width according to what device
says is best (up to 8 currently supported).
Make krb5pa-sha1-opencl choose vector width according to what device
says is best (up to 8 currently supported).
Deprecate --request-vector option and rename --request-scalar to
--force-scalar. OpenCL formats that support vectorizing will now
automatically detect vectorizing opportunity (by asking device)
and enable it with the recommended width. For benchmarking and
debugging purposes, --force-scalar will disable vectorizing.