[NEW] Add COMMANDLOG GET all, COMMANDLOG LEN all and COMMANDLOG reset all

[martinrvisser]

The problem/use-case that the feature addresses

Usability of the COMMANDLOG commands

Description of the feature

By adding an "ALL" option for the COMMANDLOG GET, COMMANDLOG LEN and COMMANDLOG RESET commands, it would make it easier to use as well as would simplify collecting metrics with a single COMMANDLOG GET.

Alternatives you've considered

N/A

Additional information

COMMANDLOG a very nice addition!

[enjoy-binbin]

Seem like a reasonable idea, but how do you distinguish the types in the obtained result set? We don't add the type to the GET response...