redis: updated to 4.0.10

Redis 4.0.10 fixes a number of important issues:

* Important security issues related to the Lua scripting engine.
  Please check https://github.com/antirez/redis/issues/5017
  for more information.

* A bug with SCAN, SSCAN, HSCAN and ZSCAN, that may not return all the elements.
  We also add a regression test that can trigger the issue often when present, and
  may in theory be able to find unrelated regressions.

* A PSYNC2 bug is fixed: Redis should not expire keys when saving RDB files
  because otherwise it is no longer possible to use such RDB file as a base
  for partial resynchronization. It no longer represents the right state.

* Compatibility of AOF with RDB preamble when the RDB checksum is disabled.

* Sentinel bug that in some cases prevented Sentinel to detect that the master
  was down immediately. A delay was added to the detection.

* Other minor issues.

(adam)