Allow WebSocket maxFrameSize to be configured

[bridger]

Today the NIOWebSocketServerUpgrader is always created with the same maxFrameSize of 1 << 14 (16kb). My app regularly sends larger frames to the server, which is causing the server to reject them.

I'd like to add a configuration parameter when setting up the route to allow larger frames. The configuration can also be used for future features, such as enabling compression or starting automatic ping/pong heartbeats.

I plan to submit a PR soon to create this feature.

[lmcd]

I'm also running into this. WebSocket connection is closing on me if I send anything over 16kb

[bridger]

I hope to get this merged in soon! There is a different PR to be merged first, and then I can update this fix maybe tonight.

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