bugfix: /Makefile: $(pg_ctl-Darwin): need to call the command rather than echoing it, as is needed for the Linux version

bugfix: /Makefile: $(pg_ctl-Darwin): need to `cd /` because due to pg_ctl bug, current directory must be accessible by it

bugfix: lib/runscripts/util.run: a non-runscript should have all args passed to main(). this fixes a bug in backups/*_snapshot where "main" would need to be prepended to any args for the script to run correctly.

bugfix: lib/runscripts/util.run: $wrap_fn: invoked script must always run as runscript so that wrapped command is run

lib/runscripts/util.run: added $is_runscript, for use by $wrap_fn

bugfix: lib/runscripts/util.run: $wrap_fn: $top_script doesn't need to be world-executable for most uses of sudo (only if sudoing to non-root)

bin/in_place: diff: use --brief to avoid scanning the entire file for large files

bin/in_place: added $preserve_mtime flag

web/links/index.htm: updated to Firefox bookmarks: Ubuntu 14.04 upgrade: Apache: documented that MultiViews is actually only broken for redirects with the filename "index"

web/.htaccess: for dirs, redirect to index.*: document it is actually just the filename "index" that MultiViews is broken for, other filenames work fine