can recv: return a list of values instead of just mkStr(data).

If this function executes correctly, you'll have a list like
this: (canid canidtype message) else NIL.
Fix picoLisp comments in platform module.

These functions don't return Nil; they
return strings (transient symbols).
rerge branch 'master' of https://github.com/simplemachines-italy/Alcor6L