Simplify postgresql.reload_config (and fix some bugs) (#1087)
Simplify postgresql.reload_config (and fix some bugs) (#1087)

`compare_values` function is already smart enough to handle all tricky cases when the unit is not in `B` or `kB`, but also in blocks. Therefore we don't need to query `wal_segment_size` from pg_settings.
zalando/patroni,zalando/patroni