Fixes debug information, bug #2230

Bug #2230 shows that the string "MySQL" is hardcoded into the debug information, whereas it should show the database type used in the installation. My solution was to just concat the database type onto the string - I felt this was less expensive than "prettifying" the string (as an administrator there should be no need - it's debug information). Alternatively, it could be replaced with a generic string such as "Database".