8186707: Remove libnio FileChannelImpl native close0() function
Summary: Remove Java_sun_nio_ch_FileChannelImpl_close0() on Unix and Windows and Java_sun_nio_ch_FileDispatcherImpl_closeByHandle on Windows only
Reviewed-by: alanb

8168628: (fc) SIGBUS when extending file size to map it
Summary: Synchronize file extension and subsequent map0(); on Linux use fallocate64() instead of ftruncate64().
Reviewed-by: rehn, simonis, alanb

8155775: Re-examine naming of privileged methods to access System properties
Reviewed-by: mullan

8154231: Simplify access to System properties from JDK code
Reviewed-by: rriggs, chegar, weijun

8137056: Move SharedSecrets and interface friends out of sun.misc
Reviewed-by: alanb, mchung, psandoz, rriggs

8068507: (fc) Rename the new jdk.net.enableFastFileTransfer system property to jdk.nio.enableFastFileTransfer
Reviewed-by: alanb

8064407: (fc) FileChannel transferTo should use TransmitFile on Windows
Reviewed-by: alanb
Contributed-by: kirk.shoop@microsoft.com, v-valkop@microsoft.com

8023173: FileDescriptor should respect append flag
Reviewed-by: martin, alanb, rriggs

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