We've been running into an issue in go-ipfs where we have way too many peer addresses. We've partially fixed this by addressing the bug where we were storing and gossiping ephemeral peer addresses indefinitely however, that's not a complete solution.

I'd like to make three proposals:

1. Sign and timestamp peer records.
2. Set a maximum size and maximum number of peer addresses allowed per record.
3. Allow peers to specify a priority for dialing each address.

While we'll have to wait a while to start validating these fields/restrictions, they'll help a lot.