Curl now depends on a symbol from SystemConfiguration

https://stackoverflow.com/questions/7781151/error-on-scdynamicstorecopyproxies-not-symbol-found

src/ruby_supportlib/phusion_passenger/platform_info/curl.rb

@@ -29,6 +29,9 @@ module PhusionPassenger
   module PlatformInfo
     def self.curl_flags
       result = `(curl-config --cflags) 2>/dev/null`.strip
+      if os_name_simple == "macosx"
+        result << ' -framework Foundation -framework SystemConfiguration'
+      end
       if result.empty?
         return nil
       else