Add network test command

internal/torrent/rclone mount flags.txt

@@ -1 +0,0 @@
---allow-non-empty --allow-other --attr-timeout 10y --buffer-size 4M --dir-cache-time 120s --poll-interval 60s --vfs-cache-max-age 2M --vfs-cache-max-size 2G --vfs-cache-min-free-space 200M --vfs-cache-mode full --vfs-cache-poll-interval 30s --vfs-disk-space-total-size 6G --vfs-fast-fingerprint --vfs-read-ahead 4M --vfs-read-chunk-size 8M --vfs-read-chunk-size-limit 0 --vfs-read-wait 5ms --vfs-refresh