matrix: working E2EE, on by default

mautrix-go now include a cryptohelper package, which solves all my
issues and just works. the setting is now on by default, however
packages are not yet built with it.

backups.go

@@ -170,5 +170,6 @@ func newBackupDaemon(app *appContext) *GenericDaemon {
 			app.makeBackup()
 		},
 	)
+	d.Name("Backup")
 	return d
 }