This is a Windows XP-specific rebuild that fixes compatibility with Windows XP x64 Edition. If you are using Windows 7 or later, or Linux, or some other OS, you can continue using v2.7.1.
Fixes #489: Installer fails on Windows XP x64 SP2
Reported by @SnowshoeIceboot.
Also fixes DLL loading for e.g. libcurl on Windows XP/2003.
See NEWS.md for the full list of changes in v2.7.1 and v2.7.