[patch] "config" download area is now a setting

Hi Henrik,

here is a small but convenient patch, that helps keep the etc/ directory of the hobbit server tidy.

Something handy would be to have a automatic suffix-with-hostname before opening the file, and fallback on the straight requested filename. That is, requesting bb-mysql.cfg from "foo.bar.com" would search for "bb-mysql.cfg-foo.bar.com" and then for "bb-mysql.cfg". I may add this early next week if you didn't already :).

Regards,

-- Charles Goyard - cgoyard at cvf.fr - (+33) 1 45 38 01 31