configure:
- replace the complex TOOLS_TO_CHECK infrastructure
with a more versatile has_or_abort function
- allows for more explicit error messages

-------- diffstat follows --------
/trunk/configure | 301 146 155 0 ++++++++++++++++++++++++++++++--------------------------------
1 file changed, 146 insertions(+), 155 deletions(-)

 This is NOT the official version of dialog.  This version has been

 significantly modified from the original.  It is for use by the Linux

 kernel configuration script.  Please do not bother Savio Lam with 

 questions about this program.