bugfix: backups/.rsync_filter.download: need to prevent existing backups from being deleted on the local side, too, by changing hide patterns to exclude

lib/sh/sync.sh: upload(): make put's $subpath option relative to the currdir instead, like the --include paths. note that $subpath unfortunately can't be used in subdirs at this point because it will cause rsync to ignore the .rsync_ignores and .rsync_filters in parent dirs, including the essential .rsync_ignore in the sync root dir.

/README.TXT: removed unnecessary `env` before kw params, which are treated as such whenever they appear before a command name

bugfix: /README.TXT: updated `make backups/download` to `make backups/<file>/download`

backups/Makefile: upload: use bin/sync_upload

inputs/Makefile: download-logs: use bin/sync_upload like upload/download

bugfix: /README.TXT: `make inputs/upload`, `make inputs/download`: added live=1 so that the sync operation runs rather than previewing what will be synced. removed test=1 because this flag is not used by put.

bugfix: inputs/Makefile: upload, download: need to exclude files in .rsync_ignore, so that large local-only files, such as inputs/GBIF/raw_occurrence_record_plants/table*.tsv, do not have to be synced before `make inputs/upload` can complete (the corresponding .gz gets extracted instead); and deleted temp files in inputs/VegBIEN/TWiki/, such as active sessions, are not added back to the live copy on vegbiendev. previously, fixing this required extracting the rsync command run by `make inputs/upload`, etc. and manually editing it to exclude the applicable .rsync_ignore files, each time `make inputs/upload`, etc. was run (including before every column-based import).

bugfix: bin/make: need to leave bin/, ~/bin/ in the PATH when running make nonrecursively, so that commands invoked by it which are located in these dirs (e.g. put, which will be used by `make inputs/upload`) can still be found. this requires using command()'s new nonrecursive=1 flag instead of running no_PATH_recursion, so that no_PATH_recursion() only affects the resolution of the command path, but does not propagate the filtered PATH to the invoked command itself.

lib/sh/util.sh: command(): added nonrecursive=1 flag, which uses cmd2abs_path to run an external command nonrecursively