This change introduces the logical flag 'noflush' to control the flushing
and synchronization of I/O buffers. Subsequently, subroutines
'enable_flush_and_sync' and 'disable_flush_and_sync' were added to enable
and disable the flushing and synchronization, respectively.
The 'flush_and_sync' subroutine was modified to respect the noflush flag.
Additionally, this change updates 'statistics.F90' to read
the 'enable_io_flush' parameter and call the appropriate subroutine
('enable_flush_and_sync' or 'disable_flush_and_sync') based on its value.
Signed-off-by: Grzegorz Kowal <grzegorz@amuncode.org>
Grzegorz Kowal
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