Minimal change to the way BACKUP_LA_LIMIT is calculated (hestiacp#4162)

Author: sahsanu

func/main.sh

@@ -35,7 +35,7 @@ HOMEDIR='/home'
 BACKUP='/backup'
 BACKUP_GZIP=9
 BACKUP_DISK_LIMIT=95
-BACKUP_LA_LIMIT=$(cat /proc/cpuinfo | grep processor | wc -l)
+BACKUP_LA_LIMIT=$(cat /proc/cpuinfo | grep '^processor' | wc -l)
 RRD_STEP=300
 BIN=$HESTIA/bin
 HESTIA_INSTALL_DIR="$HESTIA/install/deb"