fs/procfs/fs_procfsprogrem: Add /proc/progmem. This is an alternative way to...

fs/procfs/fs_procfsprogrem:  Add /proc/progmem.  This is an alternative way to get the information that was previoulsy available in apps/system/free.  apps/system/free was removed beause it made illegal calls into the OS violating the portable interface.  This new procfs entry provides the same information with no such violation.