Sylnar v1.1.33

Fixed

• Sylnar now says when the flash chip is refusing to be written. A flash record
  from a failing board showed what is really happening: the chip accepts the
  command that unlocks writing, then silently ignores every erase and reports no
  error, so writing starts over data that was never cleared. That is what a
  write-protected chip does. Before each erase Sylnar now reads the chip's two
  status registers and says plainly whether protection is on and how much of the
  chip it covers. Nothing is written to the chip to find this out.
• The warning about a too-fast erase now says outright that the board will not boot
  from what is being written, and names the protection as the cause when the chip
  reports it.

Changed

• Reverted the slower flashing link from v1.1.32. It was meant to fix the
  skipped erase and the same flash record proved it did not: at the lower speed
  every erase still finished in two or three milliseconds. It only made flashing
  slower, so the link is back to its previous speed.