1. replace all boost::shared_ptr to std::shared_ptr
2. replace all boost::scopted_ptr to std::unique_ptr
3. replace all boost::scoped_array to std::unique<T[]>
4. replace all boost:thread to std::thread
With thirdparties 1.4.0 to 1.4.1
1. Add patch for aws-c-cal-0.4.5
2. Add some solutions for `undefined reference libpsl`
3. Move libgsasl to fix link problme of libcurl.
4. Downgrade openssl to 1.0.2k to fix problem of low version glibc
from/to_base64 may return incorrect value when the value is null #4130
remove the duplicated base64 code
fix the base64 encoded string length is wrong， and this will cause the memory error
