RFR: JDK-8007799 Base64.getEncoder(0, byte[]) returns encoder that unexpectedly inserts line separator when using some of the encoding methods

[Mark Sheppard]

Hi,
    please oblige with a review of the fix for the issue JDK-8007799 as 
shown in the webrev
below:

http://cr.openjdk.java.net/~msheppar/8007799/webrev.01/

This fix takes into account the feedback from the initial review and
condenses the solution to a check on the line length in the getEncoder() 
method,
which will return an RFC4648 base64 encoder when the line length <=0.
The RFC4648 base64 encoder provides the required semantics specified
in the API.

regards
Mark