Add an `initialPacket` option#471

Merged

darrachequesne merged 3 commits intosocketio:masterfrom

darrachequesne:feature/handshake-optimisation

Jan 22, 2017

Commits on Jan 18, 2017

Add an `additionalHandshakePacket` option
darrachequesne
committed

Commits on Jan 19, 2017

use initialMessage instead of additionalHandshakePacket
darrachequesne
committed

Commits on Jan 22, 2017

initialPacket sounds better
darrachequesne
committed