Catch IOException in SafeDispose.

There are no known instances of this being thrown, but it seems reasonable to anticipate that it could be thrown from Dispose and can be safely ignored.

Author: bgrainger

src/MySqlConnector/Core/ServerSession.cs

@@ -968,7 +968,7 @@ private void ShutdownSocket()
 
 		/// <summary>
 		/// Disposes and sets <paramref name="disposable"/> to <c>null</c>, ignoring any
-		/// <see cref="SocketException"/> that is thrown.
+		/// <see cref="IOException"/> or <see cref="SocketException"/> that is thrown.
 		/// </summary>
 		/// <typeparam name="T">An <see cref="IDisposable"/> type.</typeparam>
 		/// <param name="disposable">The object to dispose.</param>
@@ -981,6 +981,9 @@ private static void SafeDispose<T>(ref T disposable)
 				{
 					disposable.Dispose();
 				}
+				catch (IOException)
+				{
+				}
 				catch (SocketException)
 				{
 				}