unit test faild,because of "http://www.boost.org" return "301 Moved Permanently" #836

OS: CentOS7.4 x64
gcc (GCC) 5.3.1 20160406 (Red Hat 5.3.1-6)
boost 1.66
cpp-netlib:0.12.0-final

tests]$ ./cpp-netlib-http-client_get_streaming_test
cpp-netlib-0.12.0-final/libs/network/test/http/client_get_streaming_test.cpp:41: Failure
Expected: 200u
Which is: 200
To be equal to: response.status()
Which is: 301
/home/limenghua/Downloads/cpp-netlib-0.12.0-final/libs/network/test/http/client_get_streaming_test.cpp:42: Failure
Expected: "OK"
To be equal to: response.status_message()
Which is: "Moved Permanently"