Up to date PiSCSI Software

PiSCSI Control (formerly RaSCSI Control) requires at least release 21.10 of the RaSCSI/PiSCSI software. This release and newer releases contain numerous extensions, new devices and bug fixes I contributed. Major parts of the PiSCSI software I have re-implemented in modern C++. Recommended release is version 22.10.
These are the most important of my changes: