lib/sh/db.sh: added psql(), which replaces psql_script_vegbien and psql_verbose_vegbien for general connections. it also supports separate command and stdin files, to allow using `\copy from pstdin`, with pstdin pointing to a separate, EOF-terminated CSV file instead of inlined with the command and terminated with the \. escape (which may be contained within the CSV file itself).
lib/sh/db.sh: added psql(), which replaces psql_script_vegbien and psql_verbose_vegbien for general connections. it also supports separate command and stdin files, to allow using `\copy from pstdin`, with pstdin pointing to a separate, EOF-terminated CSV file instead of inlined with the command and terminated with the \. escape (which may be contained within the CSV file itself).