Read operations incorrectly accept const_buffers_1

[chris_kohlhoff]

In Asio 1.4.6 / Boost 1.44, following program compiles when it shouldn't:

#include <boost/asio.hpp>
#include <string>
#include <vector>

void handler(boost::system::error_code, std::size_t) {}

int main()
{
  boost::asio::io_service io_service;
  boost::asio::ip::tcp::socket sock(io_service);

  boost::asio::const_buffers_1 cb1(0, 0);
  sock.read_some(cb1);
  sock.async_read_some(cb1, handler);

  std::string s;
  sock.read_some(boost::asio::buffer(s));
  sock.async_read_some(boost::asio::buffer(s), handler);

  const std::vector<char> v;
  sock.read_some(boost::asio::buffer(v));
  sock.async_read_some(boost::asio::buffer(v), handler);
}

[chris_kohlhoff]

(In [66056]) Fix so that read operations do not accept const_buffers_1 arguments. Refs #4746.

[chris_kohlhoff]

Fixed in [66080].