RFR 8029659: Keytool, print key algorithm of certificate or key entry

[Wang Weijun]

Hi Xuelei

Please review the code change at

   http://cr.openjdk.java.net/~weijun/8029659/webrev.00/

Keytool.html has not specified the exact output and no example touched. 
Therefore no need to request for a external export change.

Thanks
Max