ipfs bitswap wantlist

[dirkmc]

ipfs bitswap wantlist reports different things depending on whether the user passes the --peer parameter:

• ipfs bitswap wantlist reports the wants that Bitswap has sent to all peers (and has not received a response yet): "blocks that I want from my peers"
• ipfs bitswap wantlist --peer=<peer> reports the wants that Bitswap has received from that peer: "blocks that <peer> wants from me"

I'd suggest that we add subcommands that are unambiguous:

• ipfs bitswap sent-wants (with optional --peer parameter)
• ipfs bitswap received-wants (with optional --peer parameter)