ExtensionBitFast = 2 // http://www.bittorrent.org/beps/bep_0006.html
// A peer connection initiator can set this when sending a v1 infohash during handshake if they
// allow the receiving end to upgrade to v2 by responding with the corresponding v2 infohash.
- // BEP 52, and BEP 4
+ // BEP 52, and BEP 4. TODO: Set by default and then clear it when it's not appropriate to send.
ExtensionBitV2Upgrade = 4
ExtensionBitAzureusExtensionNegotiation1 = 16
ExtensionBitAzureusExtensionNegotiation2 = 17