bugfix: lib/runscripts/util.run: auto_fwd's fallback() must be set after auto_ignore's fallback() to overwrite it (auto_ignore should only apply if an error would otherwise have been generated by the fallback)

lib/runscripts/util.run: fwd(): support subdirs that don't contain a runscript, so that the default value of @subdirs will work in most cases

lib/runscripts/util.run: fwd(): set default @subdirs (`{.,}*/`)

lib/sh/util.sh: added enter_top_dir and use it in in_top_dir

fix: lib/sh/util.sh: commands run inside $(...): need to run with log++ so that these aren't normally debug-printed

lib/sh/util.sh: added pv(), which debug-prints var(s)

lib/sh/util.sh: added wildcard.()

lib/sh/util.sh: added wildcard/()

lib/sh/util.sh: added esc_args()

web/links/index.htm: updated to Firefox bookmarks: Google Drive: listed bugs that make it very difficult to use (the need to re-download all files when reconnecting a client to an account). added recommendation not to use it (unstable).