http://curl.haxx.se/auto/missing.html

The autobuild system is a superior way to make sure curl remain portable and
working on the wide range of platforms it builds and runs on.

If you have a machine with one of the missing configs, please consider firing
up an occational test. It is an easy way with a minor effort to help the
project a lot.

-- 
     Daniel Stenberg -- http://curl.haxx.se -- http://daniel.haxx.se
      Dedicated custom curl help for hire: http://haxx.se/curl.html