Fix typo in ssl::stream documentation.

doc/reference.qbk

@@ -157319,7 +157319,7 @@ This function may be used to obtain the underlying implementation of the context
   
 The `native_handle()` function returns a pointer of type `SSL*` that is suitable for passing to functions such as `SSL_get_verify_result` and `SSL_get_peer_certificate:` 
 
-  boost::asio::ssl::stream<asio:ip::tcp::socket> sock(my_context, ctx);
+  boost::asio::ssl::stream<boost::asio::ip::tcp::socket> sock(io_ctx, ctx);
 
   // ... establish connection and perform handshake ...
 

include/boost/asio/ssl/stream.hpp

@@ -188,7 +188,7 @@ public:
    * suitable for passing to functions such as @c SSL_get_verify_result and
    * @c SSL_get_peer_certificate:
    * @code
-   * boost::asio::ssl::stream<asio:ip::tcp::socket> sock(my_context, ctx);
+   * boost::asio::ssl::stream<boost::asio::ip::tcp::socket> sock(io_ctx, ctx);
    *
    * // ... establish connection and perform handshake ...
    *