+- Don't expect writing all-ones to be a safe way to write without
+ changing bit values. Minimally it loses on flash modules with
+ internal ECC, where it may change the ECC.
+ - NOR flash_write_unlock() does that between sectors
+ - there may be other cases too
+
+- Make sure all commands accept either a bank name or a bank number,
+ and be sure both identifiers show up in "flash banks" and "nand list".
+ Right now the user-friendly names are pretty much hidden...
+