Construct asio::mutable_buffer out of span

[ujos]

Could you please add an option to create an instance of the boost::asio::mutable_buffer class out of std::span / boost::span?

It is easy to manipulate with the buffer via the span interface. You can do subspan without any reallocations and prepare data ptr/size in a natural way. What is missing is a asio::mutable_buffer constructor that accepts the span.

[ujos]

Please ignore this ticket. It seems users can use boost::asio::buffer() function instead of explicitly create an instance of the mutable_buffer class