WebSocket: Deprecate default FrameOpcode parameter on send
WebSocket: Deprecate default FrameOpcode parameter on send

We should not assume what the user is sending, as it varies from one application to another.
The default might as well be binary and would seem more sensible to some.

chalucha/vibe.d,etcimon/vibe.d,etcimon/vibe.d,rejectedsoftware/vibe.d,Geod24/vibe.d,gedaiu/vibe.d,DBankov/vibe.d