[PATCH 0/3] MR5942: Cmd engine rewrite (part XI)

[eric pouech (＠epo)]

This is part XI of cmd engine rewrite.

This serie moves the IF and FOR instruction into the new CMD_NODE structure.

I'm fully aware it's a large change (commit #1).
It touches simultaneously at several components:
- lexer is no longer trying to handle nested instructions; this is now
  handled over to parser which will take care of it in a recursive
  fashion
- moving the IF and FOR instructions into CMD_NODE; this impacts the
  parser and the execution part

These three parts are so tightly linked that I can't figure out a simple
way to split first commit in smaller bits.