Update copyright notices.

svn path=/trunk/boost/asio.hpp; revision=84345
Remove the stackless coroutine class and macros from the HTTP server 4
example, and instead make them a part of Asio's documented interface.

svn path=/trunk/boost/asio.hpp; revision=84346
Fix basic_waitable_timer's underlying implementation so that it can
handle any time_point value without overflowing the intermediate
duration objects.

svn path=/trunk/boost/asio/; revision=84347
Fix a problem with lost thread wakeups that can occur when making
concurrent calls to run() and poll() on the same io_service object.

svn path=/trunk/boost/asio/; revision=84348
Fix implementation of asynchronous connect operation so that it can cope
with spurious readiness notifications from the reactor.

svn path=/trunk/boost/asio/; revision=84349