There is code in libevent to obtain the list of name server IPs the Windows way, but it was disabled when building in MSYS mode. To avoid conflicts between the Win32 and the MSYS headers, a hack is needed where the `evutil_load_windows_system_library_()` function no longer uses any Win32 types but plain C ones. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>