For the vendor code to make it through string conversions unharmed, we should make it part of the printable ASCII subset. Fixes compatibility with xusb when reading WCID descriptor.

Just saw Paul's note about USB DMA from Flash being sketchy. In the boot loader it doesn't matter since we exec from RAM anyway, but we might as well un-const the WCID descriptor for consistency.

Thought this would make the win32 dfu-util less spammy. No such luck, but it seems like a good idea anyway.

FC-Boot works now, no need for this.

This is some Microsoft-specific gunk which allows us to work with usermode apps without any onerous driver installation. Much better user experience!

Note that this now requires a debugger that can issue Mass Erase in order to reprogram the boot loader!

Otherwise, some call sites will certainly forget this...

Having problems with the WDT though...