Use OS_FileSysStatVolume() instead.  This also enables the check
to be more appropriate as this call reports the number of total
blocks, not just the free blocks, so no workaround for desktop
machines is needed.

Instead of accessing OS_time_t values directly, use the
OSAL-provided conversion and access methods.  This provides
independence/abstraction from the specific OS_time_t
definition and allows OSAL to transition to a 64 bit value.

Fix #260, Remove unused network_includes.h

Fix #1062, Remove CFE_SB_TimeOut_t typedef

Fix #1049, replace OS_fsBlocksFree

Fix #1051, use OSAL time conversion/access methods

Fix #1081, Correct deprecation directive typo

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