asio: boost warnings.
asio: boost warnings.

I don't like this change too much.  If you have better ideas...

	* include/libport/asio.hxx: Doub this a header system to shush the
	warnings we have in boost/asio/ssl.
	GCC 4.1's does not work as expected for system headers.

aldebaran/libport,aldebaran/libport,aldebaran/libport,aldebaran/libport,aldebaran/libport