Update typedefs.list to match what the buildfarm currently reports.

Make "pgoff_t" be a typedef not a #define.

Add offnum range checks to suppress compile warnings with UBSAN.

Looks like we can't test NLS on machines that lack any es_ES locale.

Try a few different locale name spellings in nls.sql.

Add a regression test to verify that NLS translation works.

Add a regression test to verify that NLS translation works.

Support "j" length modifier in snprintf.c.