Change default of dry-run flag to false

Only very minor amends. You've created a really helpful tool. Thanks.

In  srdb.class.php, the default of dry-run was set to true, which prevented me from doing a live run.

And in srdb.cli.php, the -d in the top comment should be -p. I spent a little while trying to figure out what the -d flag was for!

Thanks again.