Apache XML Security for C++ 1.2.1 release notes

• Add xklient "No Xalan" builds in VC 6.0 project files Committed by BL.
• Fix version suffixes on DLL files in VC 6.0 "No Xalan" build. Committed by BL.
• Add "No Xalan" support into VC 7.0 project files. Committed by BL.