Teach mtflasher how the backdoored firmware says hello
Remove pre-flash delay

This has not saved my ass once (the process is hard to interrupt) and it makes the annoyingly slow debug cycle slightly even more annoying. Gone!
Much more progress on the patch

Still buggy... seem to be dodging some heisenbugs that are either (a) my limited experience in ARM, (b) some unexpected holes in the supported instruction set, (c) unmapped interactions with the rest of the running program.