Feature request: add switch to enable InitiatorMSC mode on BlueSCI v2 DB25/Centronics models

[fdanapfel]

According to https://github.com/BlueSCSI/BlueSCSI-v2/wiki/USB-Bridge it is possible to use the BlueSCSI v2 as a SCSI-to-USB Bridge.

However this currently only works with the "Desktop" and "Ultra" models, because they only have switches to enable Initiator mode.

It would be great if the next revision of the "DB25" and "Centronics" models also contains a switch to enable Initiator Mode, and the default if the switch is enabled but no SD card is inserted should be that InitiatorMSC mode is activated.

This would allow the "DB25" and "Centronics" models do be used directly as a SCSI-to-USB bridge to be able to for example connect a SCSI-ZIP drive directly to a modern computer without having to buy additional adapters.