io_buffer_param is in Boost.Corosio

Author: vinniefalco

doc/modules/ROOT/pages/guide/buffers.adoc

@@ -160,15 +160,15 @@ consuming.consume(n);  // Advance by bytes read
 
 This is used internally by `read()` and `write()` but can be used directly.
 
-== buffer_param
+== io_buffer_param
 
-The `buffer_param` class type-erases buffer sequences:
+The `io_buffer_param` class type-erases buffer sequences:
 
 [source,cpp]
 ----
-#include <boost/capy/buffers/buffer_param.hpp>
+#include <boost/corosio/io_buffer_param.hpp>
 
-void accept_any_buffer(capy::buffer_param buffers)
+void accept_any_buffer(corosio::io_buffer_param buffers)
 {
     capy::mutable_buffer temp[8];
     std::size_t n = buffers.copy_to(temp, 8);