• Prefer Fetch::CurlCommand over Fetch::HTTPTiny for https when:
  
  • Net::SSLeay and IO::Socket::SSL are not installed
    
  • AND curl is installed
    
  • AND curl supports https
    This makes AB more reliable on platforms like OS X when openssl
    is broken without a third party package system like homebrew,
    and on older Perls like 5.8.x where Net::SSLeay frequently does
    not install or pass tests.
    The existing behavior of prefer Fetch::HTTPTiny when:
    
  • Net::SSLeay and IO::Socket::SSL are already installed
    
  • OR the URL is http
    
  • OR curl is not already installed
    is still in effect. (gh#93, gh#94)