Merged revisions 214517 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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  r214517 | tilghman | 2009-08-27 16:45:34 -0500 (Thu, 27 Aug 2009) | 7 lines
  
  Use autoconf to detect libcurl, as this enables cross-compilation checks, something we didn't allow before.
  (closes issue #15714)
   Reported by: pprindeville
   Patches: 
         20090813__issue15714.diff.txt uploaded by tilghman (license 14)
   Tested by: pprindeville
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@214518 65c4cc65-6c06-0410-ace0-fbb531ad65f3