public byte []
getLabel(int n) {
	int pos = offset(n);
	byte len = (byte)(name[pos] + 1);
	byte [] label = new byte[len];
	System.arraycopy(name, pos, label, 0, len);
	return label;
}
Retrieve the nth label of a Name.  This makes a copy of the label; changing
this does not change the Name.
@param n The label to be retrieved.  The first label is 0.
src/main/java/core/org/xbill/DNS/Name.java