This adds the 'airsonic.rememberMeKey' system property (can be set from
command-line with `-Dairsonic.rememberMeKey=<value>`) as well as a
'RememberMeKey' setting in airsonic.properties, so that the key used for
generating 'remember me' tokens can be persisted across server restarts.
It also adds a default, insecure key in case we are running in
development mode with the 'airsonic.development' property set.
This page wasn't linked anywhere, and was
allowing an administrator to issue arbitrary sql
comments, and was vulnerable to reflected XSS.
We should get rid of it. If you really want to issue
SQL commands, just ssh to your instance and do it from here.
Since Spring's default remember-me technique is
terrible security-wise (`user:timstamp:md5(use:timestamp:password:key)`),
we should at least use a random key, instead of a fixed one,
otherwise, and attacker able to capture the cookies
might be able to trivially bruteforce offline
the password of the associated user.