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pg_stat_reset_slru currently requires an input argument, either: - NULL to reset the SLRU counters of everything. - A specific value to reset a single SLRU cache. This commit adds support for a new pattern: pg_stat_reset_slru without any argument works the same way as pg_stat_reset_slru(NULL), relying on a DEFAULT in the function definition to handle this case. This makes the function more consistent with 23c8c0c8f472. Bump catalog version. Author: Bharath Rupireddy Reviewed-by: Atsushi Torikoshi Discussion: https://postgr.es/m/CALj2ACW1VizYg01EeH_cA-7qA+4NzWVAoZ5Lw9_XYO1RRHAZbA@mail.gmail.com