Drop '-X' rsync option from system backup

NFS mounts are not compatible with extended attributes. Ignoring them
improves script support for NFS.

README.md

@@ -152,7 +152,6 @@ Log files per backup operation will be stored at `<dst>/log`.
 
 * Used only for system backup:
 	* `-A`: preserve ACLs (implies -p).
-	* `-X`: preserve extended attributes.
 
 * Used only for log sending:
 	* `-r`: recurse into directories.

rsync-incremental-backup-system

@@ -102,7 +102,7 @@ touch "${rotationLockFilePath}"
 writeToLog "[$(${dateCmd} -Is)] Backup begins\\n"
 
 # Do the backup (with mandatory exclusions)
-if rsync -aAXhv --progress --timeout="${timeout}" --delete -W --link-dest="${bak1}/" \
+if rsync -aAhv --progress --timeout="${timeout}" --delete -W --link-dest="${bak1}/" \
 	--log-file="${logFile}" --exclude="${ownFolderPath}" --exclude-from="${exclusionFilePath}" \
 	--exclude={"/dev/*","/proc/*","/sys/*","/tmp/*","/run/*","/mnt/*","/media/*","/lost+found"} \
 	"${src}/" "${bak0}/"