bugfix: schemas/util.sql: map_nulls(): updated to use hstore(text[], anyelement), which has replaced hstore(anyarray, anyelement)

schemas/util.sql: removed hstore(anyarray, anyelement), which did not support dynamic inlining, to avoid confusion over which hstore() function to use. use new hstore(text[], anyelement) instead (with explicit cast on the keys array if needed).

schemas/util.sql: added hstore(text[], anyelement), which dynamically inlines properly, unlike hstore(anyarray, anyelement). this can be selected by explicitly casting the keys array to text[], which now provides a 6x speed improvement (380 ms -> 60 ms) for map_nulls().

schemas/util.sql: fix_array(): turned off STRICT to allow dynamic inlining, which speeds up util.map_nulls() by 3x (1500 ms -> 500 ms)

schemas/util.sql: array_length(anyarray), array_length(anyarray, dimension integer): turned off STRICT to allow dynamic inlining, which speeds up util.map_nulls(). this requires adding a `CASE WHEN $1 IS NULL THEN NULL` statement to array_length(anyarray, dimension integer) to replace the functionality provided by STRICT.

schemas/util.sql: map_nulls(): turned off STRICT to allow dynamic inlining, which causes a 2x speed improvement¹. (see r10352 for an explanation of dynamic inlining.) note that turning off STRICT disables NULL-skipping (avoiding running a function when all its params are NULL), so it should only be used when the NULL-skipping optimization is needed less than dynamic inlining....

schemas/util.sql: inlinable IMMUTABLE functions: avoid using config params (e.g. `SET search_path TO util`) because these prevent dynamic inlining (i.e. inlining of a function call with variable instead of constant arguments, by substituting the arguments into the function's body). dynamic inlining can speed up function evaluation significantly, because a (slow) call to a user-defined SQL function is avoided.

schemas/vegbien.my.sql: updated for new bin/repl text mode matching, which also affects non-regexps. this causes the replacement of a few more occurrences of PostgreSQL-only one-word typenames with their MySQL equivalents.

inputs/REMIB/Specimen/postprocess.sql: runtimes: documented the machine the times are from

inputs/REMIB/: switched to new-style import, using the steps at wiki.vegpath.org/Switching_to_new-style_import#stage-I-source-specific > "run the following for each datasource"