JDK-8196298: Add null Reader and Writer

[Brian Burkhalter]

I made a few minor changes to the CSR [1] verbiage. Probably the nullWriter() documentation should also be updated to explicitly mention all variants of both append() and write().

Thanks,

Brian

[1] https://bugs.openjdk.java.net/browse/JDK-8196350

On Jan 29, 2018, at 12:58 PM, Brian Burkhalter <brian.burkhalter at oracle.com> wrote:

> Great - thanks - will take a look.
> 
> Brian
> 
> On Jan 29, 2018, at 11:43 AM, Patrick Reinhart <patrick at reini.net> wrote:
> 
>> Just added a new CSR for it based on the one for InputStream/OutputStream...