Hi,

I have been doing restores from filesystem snapshots some times now, as I noticed ownnote looses a note occationally. It seems the "max_allowed_packet" limit is hit in mariadb. Should the notes be perhaps be chopped into smaller chunks while saving? Or saving the images as files instead?

I started collecting a note with pointers to internet, and uploaded some pictures into the note. All the sudden I lost the note :( Checking from database, the "note" entry was empty. I had to recover the database from snapshot, just to get the note back.

I'm running the latest nextcloud with ownnote activated. It's been good for long, but now it won't work any longer. Also the logic of saving the images within the note into the database bloats the DB size quickly. It would be nice if the attached pics would be files e.g. within the notes dir (once the dir + db option activated).

Here's the error log:

```
SQLSTATE[08S01]: Communication link failure: 1153 Got a packet bigger than 'max_allowed_packet' bytes","Code":0,"Trace":"#0 \/usr\/local\/www\/nextcloud\/3rdparty\/doctrine\/dbal\/lib\/Doctrine\/DBAL\/DBALException.php(116): Doctrine\DBAL\Driver\AbstractMySQLDriver->convertException('An exception oc...', Object(Doctrine\DBAL\Driver\PDOException))
#1 \/usr\/local\/www\/nextcloud\/3rdparty\/doctrine\/dbal\/lib\/Doctrine\/DBAL\/Statement.php(175): Doctrine\DBAL\DBALException::driverExceptionDuringQuery(Object(Doctrine\DBAL\Driver\PDOMySql\Driver), Object(Doctrine\DBAL\Driver\PDOException), 'INSERT INTO oc_...', Array)
#2 \/usr\/local\/www\/nextcloud\/lib\/private\/legacy\/db\/statementwrapper.php(74): Doctrine\DBAL\Statement->execute(Array)
#3 \/usr\/local\/www\/nextcloud\/apps\/ownnote\/lib\/backend.php(401): OC_DB_StatementWrapper->execute(Array)
#4 \/usr\/local\/www\/nextcloud\/apps\/ownnote\/lib\/backend.php(220): OCA\OwnNote\Lib\Backend->saveNote('', 'Arduino', '', '

Linkkej&aum...', 1475004681)
#5 \/usr\/local\/www\/nextcloud\/apps\/ownnote\/controller\/ownnoteajaxcontroller.php(44): OCA\OwnNote\Lib\Backend->getListing('ownNote', false)
#6 [internal function]: OCA\OwnNote\Controller\OwnnoteAjaxController->ajaxindex()
#7 \/usr\/local\/www\/nextcloud\/lib\/private\/AppFramework\/Http\/Dispatcher.php(160): call_user_func_array(Array, Array)
#8 \/usr\/local\/www\/nextcloud\/lib\/private\/AppFramework\/Http\/Dispatcher.php(90): OC\AppFramework\Http\Dispatcher->executeController(Object(OCA\OwnNote\Controller\OwnnoteAjaxController), 'ajaxindex')
#9 \/usr\/local\/www\/nextcloud\/lib\/private\/AppFramework\/App.php(111): OC\AppFramework\Http\Dispatcher->dispatch(Object(OCA\OwnNote\Controller\OwnnoteAjaxController), 'ajaxindex')
#10 \/usr\/local\/www\/nextcloud\/lib\/private\/AppFramework\/Routing\/RouteActionHandler.php(47): OC\AppFramework\App::main('OwnnoteAjaxCont...', 'ajaxindex', Object(OC\AppFramework\DependencyInjection\DIContainer), Array)
#11 [internal function]: OC\AppFramework\Routing\RouteActionHandler->__invoke(Array)
#12 \/usr\/local\/www\/nextcloud\/lib\/private\/Route\/Router.php(293): call_user_func(Object(OC\AppFramework\Routing\RouteActionHandler), Array)
#13 \/usr\/local\/www\/nextcloud\/lib\/base.php(967): OC\Route\Router->match('\/apps\/ownnote\/a...')
#14 \/usr\/local\/www\/nextcloud\/index.php(48): OC::handleRequest()
#15 {main}","File":"\/usr\/local\/www\/nextcloud\/3rdparty\/doctrine\/dbal\/lib\/Doctrine\/DBAL\/Driver\/AbstractMySQLDriver.php","Line":116}
```