The source project of this merge request has been removed.
Set secure_delete pragma for SQLite3 connections
secure_delete makes SQLite3 overwrite deleted data with zeros, thus actually deleting it from the filesystem.
Ubuntu and FreeBSD enable it by defualt, but some distributions, such as Debian, have it disabled by default, so it is better to set it explicitly.
The performance impact should be negligible as Gajim uses the database rarely.