[arch-dev-public] reverse staging idea

Since I know there have been complaints about packages remaining in the ftp directories when new ones are uploaded, how about we modify the /arch/db-* update scripts run by the devs to move old versions of updated packages into ~/staging/<repo>/old? This makes the default behavior that they stick around but aren't cluttering the ftp directory. Just an idea I had that I didn't want us to lose. - P