Handle luks encrypted USB drives

doc/EN/usage.org

@@ -297,7 +297,7 @@ Within F-droid search for *owncloud* and install the client. Also install *CalDA
 
 Open the owncloud app and enter your owncloud domain name (including the https prefix) and login details for the user you created.
 
-Open the calendar app and under *settings* add a CalDav account with the url:
+Open the calendar app (S planner) and under *settings* select *Calendars* then *Add account* then *CalDAV Sync Adapter*. Enter your owncloud username and password and the following URL:
 
 #+BEGIN_SRC bash
 https://myownclouddomain/remote.php/caldav/principals/myowncloudusername

src/freedombone

@@ -1552,7 +1552,7 @@ function create_backup_script {
   if grep -Fxq "create_backup_script" $COMPLETION_FILE; then
       return
   fi
-  apt-get -y install rsyncrypto
+  apt-get -y install rsyncrypto cryptsetup
 
   get_mariadb_password
   get_mariadb_gnusocial_admin_password
@@ -1574,6 +1574,7 @@ function create_backup_script {
   echo '' >> /usr/bin/$BACKUP_SCRIPT_NAME
   echo "umount -f $USB_MOUNT" >> /usr/bin/$BACKUP_SCRIPT_NAME
   echo "mkdir $USB_MOUNT" >> /usr/bin/$BACKUP_SCRIPT_NAME
+  echo "cryptsetup luksOpen $USB_DRIVE $USB_MOUNT" >> /usr/bin/$BACKUP_SCRIPT_NAME
   echo -n 'mount $USB_DRIVE ' >> /usr/bin/$BACKUP_SCRIPT_NAME
   echo "$USB_MOUNT" >> /usr/bin/$BACKUP_SCRIPT_NAME
   echo 'if [ ! "$?" = "0" ]; then' >> /usr/bin/$BACKUP_SCRIPT_NAME
@@ -2159,7 +2160,7 @@ function create_restore_script {
   if grep -Fxq "create_restore_script" $COMPLETION_FILE; then
       return
   fi
-  apt-get -y install rsyncrypto
+  apt-get -y install rsyncrypto cryptsetup
 
   get_mariadb_password
   get_mariadb_gnusocial_admin_password
@@ -2181,6 +2182,7 @@ function create_restore_script {
   echo '' >> /usr/bin/$RESTORE_SCRIPT_NAME
   echo "if [ ! -d $USB_MOUNT ]; then" >> /usr/bin/$RESTORE_SCRIPT_NAME
   echo "  mkdir $USB_MOUNT" >> /usr/bin/$RESTORE_SCRIPT_NAME
+  echo "  cryptsetup luksOpen $USB_DRIVE $USB_MOUNT" >> /usr/bin/$RESTORE_SCRIPT_NAME
   echo -n '  mount $USB_DRIVE ' >> /usr/bin/$RESTORE_SCRIPT_NAME
   echo "$USB_MOUNT" >> /usr/bin/$RESTORE_SCRIPT_NAME
   echo 'fi' >> /usr/bin/$RESTORE_SCRIPT_NAME