Re: Revenge of the $ECHO. Kill most uses of Xsed.

[Paolo Bonzini]

> Well.  This code is meant to find out the maximum command line length
> limit.  It is supposed to fork and exec.  Thinking about it, I wonder.
> It will likely fork with most shells (but not all), but chances are not
> that high that it will exec.  Means the test looks broken anyway.  :-/

You can s/$ECHO/func_fallback_echo/ then.

Paolo