439b0315c8
In SPOP, when COUNT is greater than or equal to set's size, we will remove the set. In dbDelete, we will do DEL or UNLINK according to the lazy flag. This is also required for propagate. In RESTORE, we won't store expired keys into the db, see #7472. When used together with REPLACE, it should emit a DEL or UNLINK according to the lazy flag. This PR also adds tests to cover the propagation. The RESTORE test will also cover #7472.