Record and preserve cookie creation time across updates, browser imports and cache persistence. Apply modern Lax-by-default request inclusion, including the age-bounded unsafe top-level navigation allowance; keep explicit Lax and Strict semantics, raw cookie visibility and diagnostic exclusion reasons. Cover age boundaries, updates, imports, persistence and navigation contexts.
Open existing destinations for writing before choosing the output path.
Write FIFOs and devices through their handles; reject targets whose write
permissions deny access. Keep regular-file replacement atomic and retain
the existing curl-compatible mode and umask handling.
Cover FIFO delivery, device symlinks, read-only targets and preserving the
original regular-file contents when temporary-file creation fails.
ldm0