Speed up BACKUP_LA_LIMIT check

grep -c  '^processor' /proc/cpuinfo
vs
cat /proc/cpuinfo | grep '^processor' | wc -l

is about 20 times faster ...

func/main.sh

@@ -11,7 +11,7 @@ HOMEDIR='/home'
 BACKUP='/backup'
 BACKUP_GZIP=9
 BACKUP_DISK_LIMIT=95
-BACKUP_LA_LIMIT=$(cat /proc/cpuinfo | grep '^processor' | wc -l)
+BACKUP_LA_LIMIT=$(time grep -c '^processor' /proc/cpuinfo)
 RRD_STEP=300
 BIN=$HESTIA/bin
 HESTIA_INSTALL_DIR="$HESTIA/install/deb"