Fix build on OS X 10.7 Lion and older by using CoreServices instead of CFNetwork
https://github.com/karelia/CurlHandle/issues/9
--- CURLHandle.xcodeproj/project.pbxproj.orig	2012-11-29 08:34:27.000000000 -0600
+++ CURLHandle.xcodeproj/project.pbxproj	2013-03-11 22:31:16.000000000 -0500
@@ -40,7 +40,7 @@
 		275707691503E21D00363512 /* CURLFTPSession.h in Headers */ = {isa = PBXBuildFile; fileRef = 275707671503E21C00363512 /* CURLFTPSession.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		2757076A1503E21D00363512 /* CURLFTPSession.m in Sources */ = {isa = PBXBuildFile; fileRef = 275707681503E21C00363512 /* CURLFTPSession.m */; };
 		277D77E01603804900906915 /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 0867D69BFE84028FC02AAC07 /* Foundation.framework */; };
-		277D77E2160380AF00906915 /* CFNetwork.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 277D77E1160380AF00906915 /* CFNetwork.framework */; };
+		50ED7E2816EED8D000723020 /* CoreServices.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 50ED7E2716EED8D000723020 /* CoreServices.framework */; };
 		79B96CAC0A6360E00060AC12 /* SystemConfiguration.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 79B96CA70A6360E00060AC12 /* SystemConfiguration.framework */; };
 		79B96CBF0A6360F90060AC12 /* CURLHandle.h in Headers */ = {isa = PBXBuildFile; fileRef = 79B96CBB0A6360F90060AC12 /* CURLHandle.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		79B96CC00A6360F90060AC12 /* CURLHandle.m in Sources */ = {isa = PBXBuildFile; fileRef = 79B96CBC0A6360F90060AC12 /* CURLHandle.m */; };
@@ -310,7 +310,7 @@
 		27229B3914C83905007D0FF1 /* CURLProtocol.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CURLProtocol.m; sourceTree = "<group>"; };
 		275707671503E21C00363512 /* CURLFTPSession.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CURLFTPSession.h; sourceTree = "<group>"; };
 		275707681503E21C00363512 /* CURLFTPSession.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CURLFTPSession.m; sourceTree = "<group>"; };
-		277D77E1160380AF00906915 /* CFNetwork.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = CFNetwork.framework; path = System/Library/Frameworks/CFNetwork.framework; sourceTree = SDKROOT; };
+		50ED7E2716EED8D000723020 /* CoreServices.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = CoreServices.framework; path = System/Library/Frameworks/CoreServices.framework; sourceTree = SDKROOT; };
 		32DBCF5E0370ADEE00C91783 /* CURLHandle_Prefix.pch */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CURLHandle_Prefix.pch; sourceTree = "<group>"; };
 		795946890AA88D0000EBF548 /* ResumableHTTPUploader.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ResumableHTTPUploader.h; sourceTree = "<group>"; };
 		7959468A0AA88D0000EBF548 /* ResumableHTTPUploader.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ResumableHTTPUploader.m; sourceTree = "<group>"; };
@@ -562,7 +562,7 @@
 			files = (
 				809AE1C81602C7DD001D02E1 /* libcurl.dylib in Frameworks */,
 				277D77E01603804900906915 /* Foundation.framework in Frameworks */,
-				277D77E2160380AF00906915 /* CFNetwork.framework in Frameworks */,
+				50ED7E2816EED8D000723020 /* CoreServices.framework in Frameworks */,
 				79B96CAC0A6360E00060AC12 /* SystemConfiguration.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -633,7 +633,7 @@
 			children = (
 				79B96CA70A6360E00060AC12 /* SystemConfiguration.framework */,
 				0867D69BFE84028FC02AAC07 /* Foundation.framework */,
-				277D77E1160380AF00906915 /* CFNetwork.framework */,
+				50ED7E2716EED8D000723020 /* CoreServices.framework */,
 			);
 			name = "Linked Frameworks";
 			sourceTree = "<group>";