Borg Backup wrapper Version 4.0 update

* file backup borg folder has now -file name inside. Old folder must be
  manuall renamed
* All modules have the module id name as prefix in the backup set,
  _borg_backup_set_prefix_cleanup.sh needs to be run before to clean up
  all names or prune will not correctly delete old entries

New -T for one time target backup with custom prefix to have backups
outside the automated prune. -D option to delete this set

Add borg 1.2 support for compact which is called after delete and prune
to actually clean up the space.

-b borg executable and BORG_EXECUTEABLE override setting if borg is not
in path or another borg executable should be used

borg.backup.functions.compact.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+# compact (only if BORG COMPACT is set)
+# only for borg 1.2
+
+# reset to normal IFS, so command works here
+IFS=${_IFS};
+if [ $(version $BORG_VERSION) -ge $(version "1.2.0") ]; then
+	echo "--- [COMPACT:$(date +'%F %T')] --[${MODULE}]------------------------------------>";
+	BORG_COMPACT="${BORG_COMMAND} compact -v ${OPT_PROGRESS} ${REPOSITORY}";
+	if [ ${DEBUG} -eq 1 ]; then
+			echo "${BORG_COMPACT}";
+	fi;
+	if [ ${DRYRUN} -eq 0 ]; then
+		${BORG_COMPACT};
+	fi;
+fi;
+
+# __END__