bugfix: schemas/util.sql: mk_keys_func(regtype, util.col_cast[]): need to handle 1-column records specially, because Postgres does not allow returning a 1-column record when there are OUT params

schemas/util.sql: added typed_cols(regtype)

schemas/util.sql: added mk_keys_func(regtype, col_cast[])

bugfix: schemas/util.sql: raise(): need to use $__BODY1$ in case msg contains $BODY1$ (in SQL)

bugfix: schemas/util.sql: mk_out_params(): need COALESCE around string_agg()

bugfix: schemas/util.sql: eval(): don't declare it STRICT because it should throw an error if you try to execute NULL

schemas/vegbien.sql: synced with DB, which reorders ~type tables

schemas/util.sql: added mk_out_params()

schemas/util.sql: mk_diff_query(): indented left_ table to line up vertically with right_, for easier comparison of the left_/right_ table names

schemas/util.sql: mk_diff_query(): removed special handling for CROSS JOIN because this is now handled by diff(text, text) using `FULL JOIN ON true`. this simplification allows mk_diff_query() to contain just the template structure of the FULL JOIN, without _if() calls that decrease readability.