Fix for restore job locking when using SQLite

The SQLite db handle left open prevents the job from starting and permanently freezes "s dir" command in bconsole. Not tested with mysql and postgresql (but it shouldn't hurt)

bacula-backup/restore.cgi

@@ -62,6 +62,8 @@ else {
 	@clients = ( [ $in{'client'}, $in{'job'} ] );
 	}
 
+$dbh->disconnect();
+
 foreach $clientjob (@clients) {
 	$client = $clientjob->[0];
 	$job = $clientjob->[1];