When running rb_site, it assumes the mysql database (possibly also for
other db formats) already exists. The script will crash if the database
does not exist, or when authentication fails in general. This means that
the created reviewboard www directory has to be removed, and the rb_site
script restarted (any entered information is lost). It would be great if
the script could detect the inability to connect to mysql and maybe even
offer to create the correct priviliges/database etc.