Fix deallocate_all() in FAQ
Fix deallocate_all() in FAQ

8.1 requires loop var to be record.

Reported-by: Christopher Causer

wurenny/pgbouncer-x2,digoal/pgbouncer-x2,kvap/pgbouncer,kvap/pgbouncer,wurenny/pgbouncer-x2,dbaxa/pgbouncer,digoal/pgbouncer-x2,dbaxa/pgbouncer,jaiminpan/pgbouncer,kvap/pgbouncer,jaiminpan/pgbouncer,jaiminpan/pgbouncer,wurenny/pgbouncer-x2,dbaxa/pgbouncer,jaiminpan/pgbouncer,dbaxa/pgbouncer,kvap/pgbouncer,digoal/pgbouncer-x2,wurenny/pgbouncer-x2,digoal/pgbouncer-x2