BigInteger Burnikel-Ziegler quotient and remainder calculation assumes quotient parameter is zero

BigInteger. divideAndRemainderBurnikelZiegler () assumes the quotient parameter to be zero which is the case in all places it is called from. But there is no guarantee this won't change in the future and besides, the assumption is not documented.

For more detail see also

http://mail.openjdk.java.net/pipermail/core-libs-dev/2013-August/019529.html

which includes a patch.