Mostly changes to get System.dll compiling again. Removes a bunch

Mostly changes to get System.dll compiling again.  Removes a bunch
of excludes, and now we actually build things.

2002-01-17  Miguel de Icaza  <miguel@ximian.com>

	* Win32Exception.cs: Add.

2002-01-17  Miguel de Icaza  <miguel@ximian.com>

	* TraceListenerCollection.cs: Remove Warnings.

2002-01-17  Miguel de Icaza  <miguel@ximian.com>

	* Dns.cs: Updated to API changes.

	* IPAddress.cs: Updated API.  Much left to implement.

	* Dns.cs: Remove IPToString method

2002-01-17  Miguel de Icaza  <miguel@ximian.com>

	* SocketException.cs: Reimplemented.

svn path=/trunk/mcs/; revision=2023