Clunch protection

[Bruce Karsh]

> Dennis Ritchie came up with the notion of permitting executable files to
> be executable by an arbitrary interpreter other than the CPU hardware/
> microcode; the way it's done is with a magic "number" of "#!".  The
> characters following the "#!" are interpreted as the path of the program
> to be executed and optional arguments to that program; the path of the
> file to be "executed" is given as the last argument.
> This has only been implemented on Berkeley systems, to my knowledge.

  This has also been implemented on Masscomp systems.