rlm_sql: default Acct-On/Off query for all backends is somewhat bogus

[Alan DeKok]

Stefan Winter wrote:
...
> The job of the query should be to close all open sessions, not just all
> open sessions that have been opened recently enough to not have received
> an update yet. I suggest to change the WHERE to
...
> (leaving out the acctsessiontime = 0 constraint)

  Looks good to me.

  Comments?

  Alan DeKok.