streams created from SocketChannel doesn't allow concurrent read/write
by different threads, which appear to be a bug in NIO.

Seems to work in 8.0 at least for some functional tests.
Developers can always disable it privately if they run into issues.

In order to maintain backwards compatibility we need to keep IOUtils the
same as in commons-io 1.4. This code is backwards compatible, however
most of the methods have been deprecated and should instead use the
org.apache.commons.io.IOUtils version instead.