fetch handled one URL at a time, so checking many raw resources meant
wrapping it in an external loop. Add --file <path> to read newline-
delimited URLs (- for stdin; blank lines and # comments skipped) and
--concurrency <N> to fetch them in parallel bounded by a semaphore.
Batch mode is raw HTTP only (--dump original, the default in this mode)
and prints one JSON status line per URL (url, ok, status, content_type,
bytes, elapsed_ms, or error) in input order. Rendered/DOM batch work
still belongs to scrape. A single positional URL is unchanged.
Fixes#349.
SGavrl
b5039a8a7f