8170544: Fix code scan findings in libnet
Reviewed-by: goetz, chegar

8167295: Further cleanup to the native parts of libnet/libnio
Reviewed-by: chegar

8046901: Check jdk/src/solaris/native/sun/nio for Parfait flagged uninitialized memory
Reviewed-by: rriggs, alanb

8054834: Modular Source Code
Reviewed-by: alanb, chegar, ihse, mduigou
Contributed-by: alan.bateman@oracle.com, alex.buckley@oracle.com, chris.hegarty@oracle.com, erik.joelsson@oracle.com, jonathan.gibbons@oracle.com, karen.kinnear@oracle.com, magnus.ihse.bursie@oracle.com, mandy.chung@oracle.com, mark.reinhold@oracle.com, paul.sandoz@oracle.com