[PATCH 0/4] More tests for hand-written configure (resend)

[Dennis Stosberg <dennis@stosberg.net>]

Second version of the additional tests.  Changes relative to
yesterdays's patches:

  -  Calls to the "which" command have been replaced by a shell
     function that Timo Hirvonen has written
  -  Paths to Perl and Python binaries can be given in an
     environment variable to prevent auto-detection.
  -  NO_PYTHON is set, if no suitable python can be found
  -  Fixes to make it run on Solaris.

Tested on Linux (bash, dash), Solaris 9 (sh) and NetBSD (sh/ash).

I noticed that the autoconf-based solution has replaced Pasky's
scripts in the pu branch.  Has a final decision been made?

I must admit that I'm less convinced today that a hand-written
configuration script is better than I was yesterday when I started
to write the tests.

Regards,
Dennis