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

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  -  Calls to the "which" command have been replaced by a shell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