- make lua-replicate-commands mutable (it never was, but i don't see why)
- make tcp-backlog immutable (fix a recent refactory mistake)
- increase the max limit of a few configs to match what they were before
the recent refactory

Wrap also propagate as multi

scripting: flag lua_client as CLIENT_MULTI after redis.replicate_command() immediately

Better systemd integration v2

Add config and module API for AvoidReplicaTraffic

This reverts commit 009862ab.

Add a new SET option KEEPTTL and fix issue #5256

Add module APIs for custom authentication

Add configuration option for allowing reads on cluster down

Fix outdated information on max memory policies

init server.hz early to avoid div by 0 during config file loading

Improve RM_ModuleTypeReplaceValue() API.

With the previous API, a NULL return value was ambiguous and could
represent either an old value of NULL or an error condition. The new API
returns a status code and allows the old value to be returned
by-reference.

This commit also includes test coverage based on
tests/modules/datatype.c which did not exist at the time of the original
commit.

since the refactory of config.c, it was initialized from config_hz in initServer
but apparently that's too late since the config file loading creates objects
which call LRU_CLOCK

Add no-slowlog to acl command to prevent passwords

Omits  `ACL SETUSER` from redis-cli's history

Modules must have execute permissions to load