Windows 2000 build 2019

Windows 2000 build 2019 is a build of Windows 2000 that is mentioned in the file  section of the Windows 2000 source code. Notably, there are references to WIN64, meaning this is one of the few planned IA-64 builds of Windows 2000. Plans to release an IA-64 edition of Windows 2000 were canceled in late 1999 and shifted later to Whistler, which became Windows XP 64-Bit Edition.

//$ WIN64: MaskBlt is broken in build 2019. Remove this when its working again.
 * 1) ifdef _WIN64