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HSCAN and ZSCAN` commands
into a lazy list. For redis_scan/3 and redis_sscan/4 the result is
a list of strings. For redis_hscan/4 and redis_zscan/4, the result
is a list of pairs. Options processed:
MATCH subcommand, only returning matches for
COUNT subcommand, giving a hint to the size of the
TYPE subcommand, only returning answers of the