Clarify existing slot wording on cluster start
Clarify argument to dict macro

d is more clear because the type of argument is dict not dictht

Closes #513
redis-cli: fix prompt after shutdown command

Fix redis-cli prompt to state "not connected" after a SHUTDOWN command
is sent.
Add error check for writing RDB checksum

Closes #857
Extend range of bytesToHuman to TB and PB

Also adds a fallthrough case for when given
large values (like overflow numbers of 2^64 by mistake).

Closes #858
Remove unused function

Closes #878
Fix invalid expire error for SET family commands.