bugfix: lib/sql_io.py: null_strs_str_default: removed "NA" because this is the abbr for a Spanish province (Navarra). this fixes the 2nd bug of #955, geovalidation duplicated rows.

lib/sql_io.py: cleanup_table(): debug-print null_strs

lib/sql_io.py: null_strs: made it customizable from an env var, since the same list of null_strs doesn't work for all datasources (see #957)

inputs/Cyrille_traits/Makefile: set custom $(null_strs) which handles "NA"

inputs/input.Makefile: pass make var $(null_strs) to invoked commands so it can be used by lib/sql_io.py

fix: *Makefile: changed line endings to \n so that `patch` can work with pasted input. use `svn di --extensions --ignore-eol-style` to verify no diff.

lib/sql_io.py: null_strs: made it customizable from an env var, since the same list of null_strs doesn't work for all datasources (see #957)

bugfix: web/links/index.htm: updated to Firefox bookmarks: Mac: automatic restart on power loss: also need to disable the UPSShutdownAtLevel/UPSShutdownAtMinutesLeft functions because an orderly shutdown prevents the computer from auto-restarting on power loss. Bookmarks Toolbar: reordered links to put those most relevant to VegBIEN users first.

bugfix: config/dev_machine/com.apple.PowerManagement.plist: disable the UPSShutdownAtLevel/UPSShutdownAtMinutesLeft functions because an orderly shutdown prevents the computer from auto-restarting on power loss

bugfix: /README.TXT: Datasource setup: For MS Access databases: also need to comment out `CREATE DATABASE` because pg_dump_limit is only applied to data.sql (due to requirements of the TNRS datasource)