RFR JDK-8081452: Move sun.nio.cs.AbstractCharsetProvider into jdk.charset/sun.nio.cs.ext

[Ulf Zibis]

Am 29.05.2015 um 19:42 schrieb Xueming Shen:
> But if it is decided later that we may want to have a separate ext charsets provider2, for example 
> to split most of the ibm charsets to a separate provider, it might be desired to keep it as a base 
> class ...
Hm, is it mandatory, that each charset provider must have it's own class?
I also think, that we do not need a separate class for each charset.

-Ulf