* autoload.cc (NtSetInformationFile): Define.
* cygwin.din: Export posix_fadvise and posix_fallocate.
* fhandler.cc (fhandler_base::fadvise): New method.
(fhandler_base::ftruncate): Add allow_truncate parameter.
* fhandler.h (class fhandler_base): Add fadvise method. Accomodate
new parameter to ftruncate.
(class fhandler_pipe): Add fadvise and ftruncate methods.
(class fhandler_disk_file): Add fadvise method. Accomodate new
parameter to ftruncate.
* fhandler_disk_file.cc (fhandler_disk_file::fadvise): New method.
(fhandler_disk_file::ftruncate): Accomodate new allow_truncate
parameter. Set EOF using NtSetInformationFile on NT.
* ntdll.h (struct _FILE_END_OF_FILE_INFORMATION): Define.
(NtSetInformationFile): Declare.
* pipe.cc (fhandler_pipe::fadvise): New method.
(fhandler_pipe::ftruncate): Ditto.
* syscalls.cc (posix_fadvise): New function.
(posix_fallocate): Ditto.
(ftruncate64): Accomodate second parameter to fhandler's ftruncate
method.
* include/fcntl.h: Add POSIX_FADV_* flags. Add declarations of
posix_fadvise and posix_fallocate.
* include/cygwin/version.h: Bump API minor number.
7636b58590