Recent OpenVZ kernels provides a 'realbtime' entry in /proc/stat
to track a HN boot time.
Fix regex to match only 'btime' entry.

--- prog/fiaif
+++ prog/fiaif
@@ -316,7 +316,7 @@ fi
     
 # Remove old state file if older than boot time
 if [[ -f ${SUBSYS_FILE} ]]; then
-    BOOT_TIME=$(grep btime /proc/stat|cut -f 2 -d" ")
+    BOOT_TIME=$(grep '^btime ' /proc/stat|cut -f 2 -d" ")
     SUBSYS_TIME=$(date +%s -r ${SUBSYS_FILE})
     if (( SUBSYS_TIME < BOOT_TIME )); then
 	rm -f ${SUBSYS_FILE}