Explicitly mark asio::strand as deprecated.

Use asio::io_service::strand instead.

asio/include/asio/strand.hpp

diff --git a/asio/include/asio/strand.hpp b/asio/include/asio/strand.hpp
index a81718b..7cf2dc5 100644
--- a/asio/include/asio/strand.hpp
+++ b/asio/include/asio/strand.hpp
@@ -241,7 +241,8 @@
   asio::detail::strand_service::implementation_type impl_;
 };
 
-/// Typedef for backwards compatibility.
+/// (Deprecated: Use asio::io_service::strand.) Typedef for backwards
+/// compatibility.
 typedef asio::io_service::strand strand;
 
 } // namespace asio

asio/src/examples/cpp03/tutorial/timer5/timer.cpp

diff --git a/asio/src/examples/cpp03/tutorial/timer5/timer.cpp b/asio/src/examples/cpp03/tutorial/timer5/timer.cpp
index 04c9d8c..a85b99f 100644
--- a/asio/src/examples/cpp03/tutorial/timer5/timer.cpp
+++ b/asio/src/examples/cpp03/tutorial/timer5/timer.cpp
@@ -56,7 +56,7 @@
   }
 
 private:
-  asio::strand strand_;
+  asio::io_service::strand strand_;
   asio::deadline_timer timer1_;
   asio::deadline_timer timer2_;
   int count_;

asio/src/tests/unit/strand.cpp

diff --git a/asio/src/tests/unit/strand.cpp b/asio/src/tests/unit/strand.cpp
index 28272de..befbbab 100644
--- a/asio/src/tests/unit/strand.cpp
+++ b/asio/src/tests/unit/strand.cpp
@@ -34,6 +34,7 @@
 #endif // defined(ASIO_HAS_BOOST_BIND)
 
 using namespace asio;
+typedef io_service::strand strand;
 
 #if defined(ASIO_HAS_BOOST_BIND)
 namespace bindns = boost;