BLPOP
BRPOP
ya, forgot about nillable bulk strings
A little cleanup, i.e. using nillableBulkString appropriately
LINDEX
LINSERT
LLEN
LPOP
LPUSH
LRANGE
LREM
LSET
int -> int64
LPUSHX
LTRIM
RPOP
RPOPLPUSH
RPUSH
RPUSHX