cmd line switch processor (add-on)

[RT Happe <rthappe@mathematik.uni-freiburg.de>]

I wrote:
  manual could do so, too.)  By the way, this piece of ``Usage'' and
  section 11.1.4
                   meta-arg: \ <script-file-name>

  is somewhat misleading.
To wit:
  ... with respect to interpreter triggers in scsh programs.  The manual
explains and demonstrates the usage in programs, though, I concede.

rthappe